Add cross-service alert correlation system FRE-4500

- Unified alert types (AlertSource, AlertCategory, CorrelationStatus, EntityType)
- NormalizedAlert and CorrelationGroup Prisma models
- AlertNormalizer for all 4 services (DarkWatch, SpamShield, VoicePrint, CallAnalysis)
- CorrelationEngine with temporal + entity-based correlation detection
- CorrelationService orchestrator with dashboard API
- Correlation API routes (/api/v1/correlation/*)
- Service emitters wired to DarkWatch, SpamShield, VoicePrint
- pnpm workspace config for monorepo

packages/shared-notifications/vitest.config.ts

@@ -4,6 +4,6 @@ export default defineConfig({
   test: {
     globals: true,
     environment: 'node',
-    include: ['src/**/*.test.ts'],
+    include: ['src/**/*.test.ts', 'test/**/*.test.ts'],
   },
 });