fix(api): remove noisy CSRF guard debug log (#631)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/api/src/common/guards/csrf.guard.ts

@@ -111,14 +111,9 @@ export class CsrfGuard implements CanActivate {
 
         throw new ForbiddenException("CSRF token not bound to session");
       }
-    } else {
-      this.logger.debug({
-        event: "CSRF_SKIP_SESSION_BINDING",
-        method: request.method,
-        path: request.path,
-        reason: "User context not yet available (global guard runs before AuthGuard)",
-      });
     }
+    // Note: when userId is absent, the double-submit cookie check above is
+    // sufficient CSRF protection. AuthGuard populates request.user afterward.
 
     return true;
   }