feat: integrate Datadog APM + Sentry error tracking with CloudWatch metrics FRE-4806

- Add CloudWatch metrics emitter (api_latency, api_requests, api_errors)
- Add request monitoring middleware for API (latency, error rate, throughput)
- Register error-handling, logging, and monitoring middleware in server.ts
- Add Datadog log forwarding via HTTP intake API
- Add application-level CloudWatch alarms for P99 latency, error rate, throughput
- Inject Datadog/Sentry env vars and secrets into ECS task definitions
- Add DD_API_KEY and SENTRY_DSN to ECS secrets
- Create CloudWatch log groups for datadog and sentry services
- Update .env.example with AWS_REGION and monitoring variables
- Add @aws-sdk/client-cloudwatch dependency to monitoring package

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/api/src/server.ts

@@ -4,15 +4,19 @@ import helmet from "@fastify/helmet";
 import sensible from "@fastify/sensible";
 import { extractOrGenerateRequestId } from "@shieldai/types";
 import { authMiddleware } from "./middleware/auth.middleware";
+import { errorHandlingMiddleware } from "./middleware/error-handling.middleware";
+import { loggingMiddleware } from "./middleware/logging.middleware";
+import { monitoringMiddleware } from "./middleware/monitoring.middleware";
 import { darkwatchRoutes } from "./routes/darkwatch.routes";
 import { voiceprintRoutes } from "./routes/voiceprint.routes";
 import { correlationRoutes } from "./routes/correlation.routes";
 import { extensionRoutes } from "./routes/extension.routes";
-import { initDatadog, initSentry, captureSentryError } from "@shieldai/monitoring";
+import { initDatadog, initSentry, initDatadogLogs, captureSentryError } from "@shieldai/monitoring";
 import { getCorsOrigins } from "./config/api.config";
 
 initDatadog();
 initSentry();
+initDatadogLogs();
 
 const app = Fastify({
   logger: {
@@ -29,6 +33,15 @@ async function bootstrap() {
   // Register auth middleware to populate request.user
   await app.register(authMiddleware);
 
+  // Register logging middleware (request/response logging)
+  await app.register(loggingMiddleware);
+
+  // Register monitoring middleware (CloudWatch metrics)
+  await app.register(monitoringMiddleware);
+
+  // Register error handling middleware (Sentry integration)
+  await app.register(errorHandlingMiddleware);
+
   app.addHook("onRequest", async (request, _reply) => {
     const requestId = extractOrGenerateRequestId(request.headers);
     request.id = requestId;