feat: event bus with Redpanda + AI insight consumer

- EventBusService: Kafka/Redpanda pub/sub with kafkajs, graceful fallback when broker unavailable
- Topics: call.completed, call.missed, agent.state
- AiInsightConsumer: on call.completed, fetches lead activity → OpenAI generates summary + suggested action → updates Lead entity on platform
- Disposition endpoint emits call.completed event after Ozonetel dispose
- EventsModule registered as @Global for cross-module injection
- Redpanda container added to VPS docker-compose
- Docker image rebuilt for linux/amd64 with kafkajs dependency

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/ozonetel/ozonetel-agent.controller.ts

@@ -3,6 +3,8 @@ import { ConfigService } from '@nestjs/config';
 import { OzonetelAgentService } from './ozonetel-agent.service';
 import { MissedQueueService } from '../worklist/missed-queue.service';
 import { PlatformGraphqlService } from '../platform/platform-graphql.service';
+import { EventBusService } from '../events/event-bus.service';
+import { Topics } from '../events/event-types';
 
 @Controller('api/ozonetel')
 export class OzonetelAgentController {
@@ -17,6 +19,7 @@ export class OzonetelAgentController {
         private readonly config: ConfigService,
         private readonly missedQueue: MissedQueueService,
         private readonly platform: PlatformGraphqlService,
+        private readonly eventBus: EventBusService,
     ) {
         this.defaultAgentId = config.get<string>('OZONETEL_AGENT_ID') ?? 'agent3';
         this.defaultAgentPassword = config.get<string>('OZONETEL_AGENT_PASSWORD') ?? '';
@@ -161,6 +164,20 @@ export class OzonetelAgentController {
             this.logger.warn(`Auto-assignment after dispose failed: ${err}`);
         }
 
+        // Emit event for downstream processing (AI insights, metrics, etc.)
+        this.eventBus.emit(Topics.CALL_COMPLETED, {
+            callId: null,
+            ucid: body.ucid,
+            agentId: this.defaultAgentId,
+            callerPhone: body.callerPhone ?? '',
+            direction: body.direction ?? 'INBOUND',
+            durationSec: body.durationSec ?? 0,
+            disposition: body.disposition,
+            leadId: body.leadId ?? null,
+            notes: body.notes ?? null,
+            timestamp: new Date().toISOString(),
+        }).catch(() => {});
+
         return { status: 'ok' };
     }