Add updated_at column to users table and remove debug logging from profile update handler

go_cloud/internal/http/routes.go

@@ -3857,7 +3857,6 @@ func getUserProfileHandler(w http.ResponseWriter, r *http.Request, db *database.
 
 // updateUserProfileHandler updates the current user's profile information
 func updateUserProfileHandler(w http.ResponseWriter, r *http.Request, db *database.DB, auditLogger *audit.Logger) {
-	log.Printf("DEBUG: updateUserProfileHandler called")
 	userIDStr, ok := middleware.GetUserID(r.Context())
 	if !ok {
 		errors.WriteError(w, errors.CodeUnauthenticated, "Unauthorized", http.StatusUnauthorized)
@@ -3881,8 +3880,6 @@ func updateUserProfileHandler(w http.ResponseWriter, r *http.Request, db *databa
 		return
 	}
 
-	log.Printf("DEBUG: updateUserProfileHandler req: displayName=%v, email=%v, avatarUrl=%v", req.DisplayName, req.Email, req.AvatarURL)
-
 	// Build dynamic update query
 	var setParts []string
 	var args []interface{}