feat: sqlite_open basePath — resuelve paths relativos desde directorio de config

Nuevo parámetro basePath en SQLiteOpen para resolver paths relativos
contra un directorio base (ej: filepath.Dir del archivo YAML de config)
en lugar del cwd del proceso. basePath vacío mantiene comportamiento anterior.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

functions/infra/sqlite_open.go

@@ -3,6 +3,7 @@ package infra
 import (
 	"database/sql"
 	"fmt"
+	"path/filepath"
 
 	_ "github.com/mattn/go-sqlite3"
 )
@@ -10,18 +11,27 @@ import (
 // SQLiteOpen opens (or creates) a SQLite database file with WAL mode and
 // foreign key support enabled. Returns a ready-to-use *sql.DB or an error.
 // Pass ":memory:" for an in-memory database.
-func SQLiteOpen(path string) (*sql.DB, error) {
+//
+// If basePath is non-empty and path is relative, the path is resolved as
+// filepath.Join(basePath, path). This is useful when the path comes from a
+// config file and must be interpreted relative to that file's directory rather
+// than the process working directory.
+func SQLiteOpen(path string, basePath string) (*sql.DB, error) {
 	if path == "" {
 		return nil, fmt.Errorf("sqlite_open: path must not be empty (use ':memory:' for in-memory)")
 	}
-	dsn := fmt.Sprintf("file:%s?_journal_mode=WAL&_foreign_keys=on", path)
+	resolved := path
+	if basePath != "" && path != ":memory:" && !filepath.IsAbs(path) {
+		resolved = filepath.Join(basePath, path)
+	}
+	dsn := fmt.Sprintf("file:%s?_journal_mode=WAL&_foreign_keys=on", resolved)
 	db, err := sql.Open("sqlite3", dsn)
 	if err != nil {
-		return nil, fmt.Errorf("sqlite_open: open %q: %w", path, err)
+		return nil, fmt.Errorf("sqlite_open: open %q: %w", resolved, err)
 	}
 	if err := db.Ping(); err != nil {
 		db.Close()
-		return nil, fmt.Errorf("sqlite_open: ping %q: %w", path, err)
+		return nil, fmt.Errorf("sqlite_open: ping %q: %w", resolved, err)
 	}
 	return db, nil
 }