feat(performance-alerts): rules-engine-driven alerts, persisted as PerformanceAlert

Phase A+B of the alerts overhaul:

- New PerformanceFactsProvider exposes agent.idleMinutes (from
  AgentSession), agent.busyMinutes, agent.totalCallsToday,
  agent.bookedCallsToday, agent.conversionPercent
- Implement EscalateActionHandler (was a stub): persists a
  PerformanceAlert row, dedupes per agent+type+IST date so a 5-min
  cron can't spam, updates value if it changes
- New PerformanceConsumer: setInterval every 5 min, reads on_schedule
  rules referencing agent.* facts, evaluates per agent, dispatches
  escalate actions
- Two starter rules in hospital-starter.json: excessive-idle (>60min)
  and low-conversion (<15% with >10 calls today). NPS deferred — no
  source signal exists yet
- New PerformanceAlertsController: GET /api/supervisor/performance-alerts
  (active list), POST /:id/dismiss, POST /dismiss-all
- Rules engine now injects EscalateActionHandler via DI so the action
  has access to PlatformGraphqlService for persistence

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

src/rules-engine/rules-engine.module.ts

@@ -1,14 +1,26 @@
 // src/rules-engine/rules-engine.module.ts
 
 import { Module } from '@nestjs/common';
+import { PlatformModule } from '../platform/platform.module';
 import { RulesEngineController } from './rules-engine.controller';
 import { RulesEngineService } from './rules-engine.service';
 import { RulesStorageService } from './rules-storage.service';
 import { WorklistConsumer } from './consumers/worklist.consumer';
+import { PerformanceConsumer } from './consumers/performance.consumer';
+import { EscalateActionHandler } from './actions/escalate.action';
+import { PerformanceFactsProvider } from './facts/performance-facts.provider';
 
 @Module({
+    imports: [PlatformModule],
     controllers: [RulesEngineController],
-    providers: [RulesEngineService, RulesStorageService, WorklistConsumer],
-    exports: [RulesEngineService, RulesStorageService, WorklistConsumer],
+    providers: [
+        RulesEngineService,
+        RulesStorageService,
+        WorklistConsumer,
+        PerformanceConsumer,
+        EscalateActionHandler,
+        PerformanceFactsProvider,
+    ],
+    exports: [RulesEngineService, RulesStorageService, WorklistConsumer, PerformanceConsumer],
 })
 export class RulesEngineModule {}