Add initial Go CLI skeleton

internal/db/pragmas.go

@@ -0,0 +1,23 @@
+package db
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+)
+
+func applyPragmas(ctx context.Context, db *sql.DB) error {
+	pragmas := []string{
+		"PRAGMA foreign_keys = ON;",
+		"PRAGMA journal_mode = WAL;",
+		"PRAGMA busy_timeout = 5000;",
+	}
+
+	for _, pragma := range pragmas {
+		if _, err := db.ExecContext(ctx, pragma); err != nil {
+			return fmt.Errorf("apply pragma %q: %w", pragma, err)
+		}
+	}
+
+	return nil
+}