fix(wallet): resolve account creation and wallet status query issues

This commit fixes three critical bugs that prevented the wallet creation
flow from completing successfully:

1. mpc-service: extraPayload not included in Kafka messages
   - KeygenCompletedEvent's extraPayload (containing userId, accountSequence,
     username, derivedAddresses) was being set dynamically but not serialized
   - identity-service received events without userId and skipped processing
   - Fix: Merge extraPayload into the published payload in event-publisher

2. mpc-service: KAFKA_BROKERS hostname mismatch
   - mpc-service used KAFKA_BROKERS=rwa-kafka:29092
   - Kafka advertises itself as kafka:29092 in cluster metadata
   - During consumer group rebalance, mpc-service couldn't connect to
     the coordinator address returned by Kafka
   - Fix: Use kafka:29092 to match Kafka's advertised listener

3. blockchain-service: recovery_mnemonics table missing
   - RecoveryMnemonic model exists in schema.prisma but not in migration
   - prisma migrate deploy found no pending migrations
   - Address derivation failed with "table does not exist" error
   - Fix: Use prisma db push instead of migrate deploy to sync schema

Tested: E2E flow now completes successfully
- POST /user/auto-create creates account
- MPC keygen completes and publishes event with extraPayload
- blockchain-service derives addresses and saves recovery mnemonic
- GET /user/wallet returns status=ready with 3 addresses and mnemonic

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

backend/services/blockchain-service/Dockerfile

@@ -52,11 +52,11 @@ RUN DATABASE_URL="postgresql://user:pass@localhost:5432/db" npx prisma generate
 # Copy built files
 COPY --from=builder /app/dist ./dist
 
-# Create startup script that runs migrations before starting the app
+# Create startup script that syncs schema before starting the app
 RUN echo '#!/bin/sh\n\
 set -e\n\
-echo "Running database migrations..."\n\
-npx prisma migrate deploy || npx prisma db push --accept-data-loss\n\
+echo "Syncing database schema..."\n\
+npx prisma db push --skip-generate\n\
 echo "Starting application..."\n\
 exec node dist/main.js\n' > /app/start.sh && chmod +x /app/start.sh
 

backend/services/docker-compose.yml

@@ -342,7 +342,7 @@ services:
       - REDIS_PORT=6379
       - REDIS_PASSWORD=${REDIS_PASSWORD:-}
       - REDIS_DB=5
-      - KAFKA_BROKERS=rwa-kafka:29092
+      - KAFKA_BROKERS=kafka:29092
       - KAFKA_CLIENT_ID=mpc-service
       - KAFKA_GROUP_ID=mpc-service-group
       # MPC System - 使用 Docker 网络内部地址

backend/services/mpc-service/src/infrastructure/messaging/kafka/event-publisher.service.ts

@@ -73,13 +73,17 @@ export class EventPublisherService implements OnModuleInit, OnModuleDestroy {
     this.logger.log(`[PUBLISH] EventId: ${event.eventId}`);
     this.logger.log(`[PUBLISH] AggregateId: ${event.aggregateId}`);
 
+    // Merge extraPayload into payload if present (used by KeygenCompletedEvent etc.)
+    const extraPayload = (event as any).extraPayload || {};
+    const fullPayload = { ...event.payload, extraPayload };
+
     const messageValue = {
       eventId: event.eventId,
       eventType: event.eventType,
       occurredAt: event.occurredAt.toISOString(),
       aggregateId: event.aggregateId,
       aggregateType: event.aggregateType,
-      payload: event.payload,
+      payload: fullPayload,
     };
 
     this.logger.log(`[PUBLISH] Payload keys: ${Object.keys(event.payload).join(', ')}`);