refactor(infra): split de drivers pesados a subpaquetes + fix TestSSEHandler

Mueve duckdb_open, clickhouse_open, postgres_open, matrix_* y keyring_token_store
del paquete monolitico functions/infra a subpaquetes propios
(functions/infra/{duckdb,clickhouse,postgres,matrix,keyring}). El paquete infra ya
no importa los drivers (go-duckdb, clickhouse-go, pgx, mautrix, go-keyring), por lo
que las apps que solo usan funciones ligeras (process, cron, http, sqlite) dejan de
arrastrarlos. Reduccion de binarios: dag_engine 72->10MB, registry_api 70->8.7MB,
services_api 70->9MB, call_monitor 68->6.6MB, sqlite_api 70->8.9MB.

Los IDs del registry se mantienen estables (domain: infra en frontmatter). Se
preservan los build tags goolm/libolm de matrix_crypto_init.

Tambien corrige TestSSEHandler: el test leia el body con un unico Read() que con
HTTP chunked solo capturaba el primer evento; ahora usa io.ReadAll hasta EOF.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

functions/infra/clickhouse/clickhouse_open.go

@@ -1,6 +1,4 @@
-//go:build !noclickhouse
-
-package infra
+package clickhouse
 
 import (
 	"database/sql"

functions/infra/clickhouse/clickhouse_open.md

@@ -29,7 +29,7 @@ output: "conexion sql.DB abierta a ClickHouse con ping verificado"
 tested: false
 tests: []
 test_file_path: ""
-file_path: "functions/infra/clickhouse_open.go"
+file_path: "functions/infra/clickhouse/clickhouse_open.go"
 ---
 
 ## Ejemplo

functions/infra/duckdb/duckdb_open.go

@@ -1,6 +1,4 @@
-//go:build !noduckdb
-
-package infra
+package duckdb
 
 import (
 	"database/sql"

functions/infra/duckdb/duckdb_open.md

@@ -21,7 +21,7 @@ output: "conexion sql.DB abierta a DuckDB"
 tested: false
 tests: []
 test_file_path: ""
-file_path: "functions/infra/duckdb_open.go"
+file_path: "functions/infra/duckdb/duckdb_open.go"
 ---
 
 ## Ejemplo

functions/infra/keyring/keyring_token_store.go

@@ -1,4 +1,4 @@
-package infra
+package keyring
 
 import (
 	"encoding/json"
@@ -20,7 +20,7 @@ type Token struct {
 	UserID        string    `json:"user_id"`
 	DeviceID      string    `json:"device_id,omitempty"`
 	HomeserverURL string    `json:"homeserver_url"`
-	Issuer        string    `json:"issuer,omitempty"`   // MAS/OIDC issuer URL
+	Issuer        string    `json:"issuer,omitempty"`    // MAS/OIDC issuer URL
 	ClientID      string    `json:"client_id,omitempty"` // MAS client_id used
 }
 

functions/infra/keyring/keyring_token_store.md

@@ -54,8 +54,8 @@ tests:
   - "Save then Delete then Load returns ErrNotFound"
   - "Delete nonexistent is idempotent"
   - "Save twice overwrites with second token"
-test_file_path: "functions/infra/keyring_token_store_test.go"
-file_path: "functions/infra/keyring_token_store.go"
+test_file_path: "functions/infra/keyring/keyring_token_store_test.go"
+file_path: "functions/infra/keyring/keyring_token_store.go"
 ---
 
 ## Ejemplo

functions/infra/keyring/keyring_token_store_test.go

@@ -1,4 +1,4 @@
-package infra
+package keyring
 
 import (
 	"errors"

functions/infra/matrix/matrix_client_init.go

@@ -1,4 +1,4 @@
-package infra
+package matrix
 
 import (
 	"context"

functions/infra/matrix/matrix_client_init.md

@@ -38,8 +38,8 @@ tests:
   - "Whoami 401 token invalido"
   - "EnableCrypto true devuelve error not implemented"
   - "StoreDir se crea con permisos 0700"
-test_file_path: "functions/infra/matrix_client_init_test.go"
-file_path: "functions/infra/matrix_client_init.go"
+test_file_path: "functions/infra/matrix/matrix_client_init_test.go"
+file_path: "functions/infra/matrix/matrix_client_init.go"
 ---
 
 ## Ejemplo

functions/infra/matrix/matrix_client_init_test.go

@@ -1,4 +1,4 @@
-package infra
+package matrix
 
 import (
 	"encoding/json"

functions/infra/matrix/matrix_crypto_init.go

@@ -1,6 +1,6 @@
 //go:build goolm || libolm
 
-package infra
+package matrix
 
 import (
 	"context"

functions/infra/matrix/matrix_crypto_init.md

@@ -38,8 +38,8 @@ tests:
   - "directorio del store se crea con permisos 0700"
   - "input valido Init exito helper no nil"
   - "Synapse 401 en keys upload devuelve error"
-test_file_path: "functions/infra/matrix_crypto_init_test.go"
-file_path: "functions/infra/matrix_crypto_init.go"
+test_file_path: "functions/infra/matrix/matrix_crypto_init_test.go"
+file_path: "functions/infra/matrix/matrix_crypto_init.go"
 ---
 
 ## Ejemplo

functions/infra/matrix/matrix_crypto_init_test.go

@@ -1,6 +1,6 @@
 //go:build goolm || libolm
 
-package infra
+package matrix
 
 import (
 	"context"
@@ -72,10 +72,10 @@ func newSynapseMock(t *testing.T, uploadStatus int) *httptest.Server {
 	mux.HandleFunc("/_matrix/client/v3/keys/query", func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
 		resp := map[string]any{
-			"device_keys":  map[string]any{},
-			"failures":     map[string]any{},
-			"master_keys":  map[string]any{},
-			"user_signing_keys":  map[string]any{},
+			"device_keys":       map[string]any{},
+			"failures":          map[string]any{},
+			"master_keys":       map[string]any{},
+			"user_signing_keys": map[string]any{},
 			"self_signing_keys": map[string]any{},
 		}
 		_ = json.NewEncoder(w).Encode(resp)
@@ -85,9 +85,9 @@ func newSynapseMock(t *testing.T, uploadStatus int) *httptest.Server {
 	mux.HandleFunc("/_matrix/client/v3/sync", func(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Type", "application/json")
 		resp := map[string]any{
-			"next_batch":       "s0_1",
-			"rooms":            map[string]any{},
-			"to_device":        map[string]any{"events": []any{}},
+			"next_batch":                 "s0_1",
+			"rooms":                      map[string]any{},
+			"to_device":                  map[string]any{"events": []any{}},
 			"device_one_time_keys_count": map[string]any{},
 		}
 		_ = json.NewEncoder(w).Encode(resp)

functions/infra/matrix/matrix_message_send.go

@@ -1,4 +1,4 @@
-package infra
+package matrix
 
 import (
 	"bytes"

functions/infra/matrix/matrix_message_send.md

@@ -53,8 +53,8 @@ tests:
   - "SendReply client nil devuelve error"
   - "EditMessage client nil devuelve error"
   - "SendReaction client nil devuelve error"
-test_file_path: "functions/infra/matrix_message_send_test.go"
-file_path: "functions/infra/matrix_message_send.go"
+test_file_path: "functions/infra/matrix/matrix_message_send_test.go"
+file_path: "functions/infra/matrix/matrix_message_send.go"
 ---
 
 ## Ejemplo

functions/infra/matrix/matrix_message_send_test.go

@@ -1,4 +1,4 @@
-package infra
+package matrix
 
 import (
 	"context"

functions/infra/matrix/matrix_room_list.go

@@ -1,4 +1,4 @@
-package infra
+package matrix
 
 import (
 	"context"
@@ -23,8 +23,8 @@ type RoomSummary struct {
 	IsSpace        bool     `json:"is_space"`     // m.room.type == m.space
 	IsEncrypted    bool     `json:"is_encrypted"` // m.room.encryption state event presente
 	MemberCount    int      `json:"member_count"`
-	LastEventTs    int64    `json:"last_event_ts"` // unix ms del ultimo evento conocido
-	UnreadCount    int      `json:"unread_count"`  // notifications.unread + highlight
+	LastEventTs    int64    `json:"last_event_ts"`  // unix ms del ultimo evento conocido
+	UnreadCount    int      `json:"unread_count"`   // notifications.unread + highlight
 	Tags           []string `json:"tags,omitempty"` // m.tag account_data
 }
 

functions/infra/matrix/matrix_room_list.md

@@ -30,8 +30,8 @@ tests:
   - "IsDirect set correctamente segun m.direct"
   - "IsEncrypted set segun presencia de m.room.encryption"
   - "client nil devuelve error"
-test_file_path: "functions/infra/matrix_room_list_test.go"
-file_path: "functions/infra/matrix_room_list.go"
+test_file_path: "functions/infra/matrix/matrix_room_list_test.go"
+file_path: "functions/infra/matrix/matrix_room_list.go"
 ---
 
 ## Ejemplo

functions/infra/matrix/matrix_room_list_test.go

@@ -1,4 +1,4 @@
-package infra
+package matrix
 
 import (
 	"context"
@@ -18,9 +18,9 @@ import (
 // los handlers lo decodifican antes de hacer lookup.
 type matrixTestServer struct {
 	*httptest.Server
-	joinedRooms    []string          // room IDs que devuelve /joined_rooms
-	roomNames      map[string]string // roomID -> name (no seteado = sin m.room.name)
-	encryptedRooms map[string]bool   // roomID -> tiene encryption event
+	joinedRooms    []string            // room IDs que devuelve /joined_rooms
+	roomNames      map[string]string   // roomID -> name (no seteado = sin m.room.name)
+	encryptedRooms map[string]bool     // roomID -> tiene encryption event
 	directContent  map[string][]string // userID -> []roomID
 	roomTags       map[string][]string // roomID -> []tag names
 }

functions/infra/matrix/matrix_sync_service.go

@@ -1,4 +1,4 @@
-package infra
+package matrix
 
 import (
 	"context"

functions/infra/matrix/matrix_sync_service.md

@@ -36,8 +36,8 @@ tests:
   - "Error401NoExit"
   - "StopIdempotente"
   - "CtxCancelCierraChannels"
-test_file_path: "functions/infra/matrix_sync_service_test.go"
-file_path: "functions/infra/matrix_sync_service.go"
+test_file_path: "functions/infra/matrix/matrix_sync_service_test.go"
+file_path: "functions/infra/matrix/matrix_sync_service.go"
 ---
 
 ## Ejemplo

functions/infra/matrix/matrix_sync_service_test.go

@@ -1,6 +1,6 @@
 //go:build goolm
 
-package infra
+package matrix
 
 import (
 	"context"
@@ -163,7 +163,7 @@ func TestMatrixSyncService_BackoffRecovery(t *testing.T) {
 	cli := newTestSyncClient(t, srv.URL)
 	h, err := MatrixSyncService(context.Background(), MatrixSyncServiceConfig{
 		Client:           cli,
-		InitialBackoffMS: 50,  // backoff corto para tests
+		InitialBackoffMS: 50, // backoff corto para tests
 		MaxBackoffMS:     200,
 		ChannelBuffer:    16,
 	})

functions/infra/postgres/postgres_open.go

@@ -1,4 +1,4 @@
-package infra
+package postgres
 
 import (
 	"database/sql"

functions/infra/postgres/postgres_open.md

@@ -31,7 +31,7 @@ output: "conexion sql.DB abierta a PostgreSQL"
 tested: false
 tests: []
 test_file_path: ""
-file_path: "functions/infra/postgres_open.go"
+file_path: "functions/infra/postgres/postgres_open.go"
 ---
 
 ## Ejemplo

functions/infra/sse_test.go

@@ -2,6 +2,7 @@ package infra
 
 import (
 	"context"
+	"io"
 	"net/http"
 	"net/http/httptest"
 	"strings"
@@ -210,9 +211,16 @@ func TestSSEHandler(t *testing.T) {
 		}
 		defer resp.Body.Close()
 
-		buf := make([]byte, 4096)
-		n, _ := resp.Body.Read(buf)
-		body := string(buf[:n])
+		// Leer el body completo hasta EOF. El canal se cierra antes de la
+		// peticion, asi que el handler envia ambos eventos y termina, cerrando
+		// el stream. Un unico Read podria devolver solo el primer chunk
+		// (event: first), porque io.Reader.Read no garantiza llenar el buffer;
+		// io.ReadAll consume todos los chunks emitidos por el handler.
+		raw, err := io.ReadAll(resp.Body)
+		if err != nil {
+			t.Fatalf("read body failed: %v", err)
+		}
+		body := string(raw)
 
 		for _, want := range []string{"event: first", "event: second", "data: 1", "data: 2"} {
 			if !strings.Contains(body, want) {