docs(flows): DoD obligatorio con user-facing surface + abrir issues 0100-0103 (taxonomia, frontmatter migration, dev_console, work dashboard)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

datafactory_tables.go

@@ -0,0 +1,92 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"os/exec"
+	"strconv"
+	"strings"
+)
+
+type tableInfo struct {
+	Name     string
+	RowCount int64
+}
+
+// listTablesForDatabase returns the list of tables for a given DB file.
+// Supports kind="sqlite" (uses database/sql + sqlite3 driver) and
+// kind="duckdb" (uses python venv subprocess since go-duckdb is not linked
+// in sqlite_api — it lives in the root module, not here).
+func listTablesForDatabase(kind, path string) ([]tableInfo, error) {
+	switch kind {
+	case "sqlite":
+		return listSQLiteTables(path)
+	case "duckdb":
+		return listDuckDBTablesViaCLI(path)
+	default:
+		return nil, fmt.Errorf("unsupported kind: %s", kind)
+	}
+}
+
+func listSQLiteTables(path string) ([]tableInfo, error) {
+	db, err := sql.Open("sqlite3", "file:"+path+"?mode=ro")
+	if err != nil {
+		return nil, err
+	}
+	defer db.Close()
+
+	rows, err := db.Query(`
+		SELECT name FROM sqlite_master
+		WHERE type='table'
+		  AND name NOT LIKE 'sqlite_%'
+		  AND name != '_migrations'
+		ORDER BY name`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var out []tableInfo
+	for rows.Next() {
+		var name string
+		if err := rows.Scan(&name); err != nil {
+			continue
+		}
+		var cnt int64
+		row := db.QueryRow(`SELECT count(*) FROM "` + name + `"`)
+		_ = row.Scan(&cnt)
+		out = append(out, tableInfo{Name: name, RowCount: cnt})
+	}
+	return out, nil
+}
+
+func listDuckDBTablesViaCLI(path string) ([]tableInfo, error) {
+	// Use the python venv's duckdb module to avoid linking go-duckdb.
+	pyBin := "/home/lucas/fn_registry/python/.venv/bin/python3"
+	script := fmt.Sprintf(
+		`import duckdb,sys
+c=duckdb.connect(%q, read_only=True)
+for (name,) in c.execute("SELECT table_name FROM information_schema.tables WHERE table_schema='main' ORDER BY table_name").fetchall():
+    cnt=c.execute(f'SELECT count(*) FROM "{name}"').fetchone()[0]
+    print(f"{name}\t{cnt}")
+`, path)
+	cmd := exec.Command(pyBin, "-c", script)
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return nil, fmt.Errorf("duckdb via python: %w (output: %s)", err, string(out))
+	}
+
+	var result []tableInfo
+	for _, line := range strings.Split(strings.TrimSpace(string(out)), "\n") {
+		if line == "" {
+			continue
+		}
+		parts := strings.SplitN(line, "\t", 2)
+		if len(parts) != 2 {
+			continue
+		}
+		cnt, _ := strconv.ParseInt(strings.TrimSpace(parts[1]), 10, 64)
+		result = append(result, tableInfo{Name: parts[0], RowCount: cnt})
+	}
+	return result, nil
+}