fix(sdk): requestPlugin skips cross-service 'no matching handler' errors with fallback timer

src/backend/services/core.service.ts

@@ -238,16 +238,35 @@ export class CoreService {
       const result = await new Promise<T | null>((resolve) => {
         const timer = setTimeout(() => {
           this.logger.warn(`[requestPlugin] Timeout for ${routingKey}`);
+          if (errorFallback) clearTimeout(errorFallback);
           resolve(null);
         }, timeoutMs);
 
+        let errorFallback: ReturnType<typeof setTimeout> | null = null;
+
         ch.consume(replyQueue.queue, (rmqMsg) => {
           if (rmqMsg && rmqMsg.properties.correlationId === correlationId) {
-            clearTimeout(timer);
             try {
               const parsed = JSON.parse(rmqMsg.content.toString());
-              resolve(parsed.response ?? parsed);
+              const response = parsed.response ?? parsed;
+
+              // Skip "no matching handler" errors from other services
+              // and wait for the correct response (up to timeoutMs - 1s)
+              if (response && response.err) {
+                if (!errorFallback) {
+                  errorFallback = setTimeout(() => {
+                    clearTimeout(timer);
+                    resolve(response);
+                  }, Math.min(timeoutMs - 1000, 15000));
+                }
+                return;
+              }
+
+              if (errorFallback) clearTimeout(errorFallback);
+              clearTimeout(timer);
+              resolve(response);
             } catch {
+              clearTimeout(timer);
               resolve(null);
             }
           }