fix: address Code Reviewer findings for Datadog/Sentry integration FRE-4806

P1: Load dd-trace before other modules via datadog-init.ts entry point
P1: Batch all CloudWatch metrics into single PutMetricDataCommand per request
P2: Deduplicate warning logs with else-if for high latency vs error
P3: Add response.ok check to Datadog log forwarding fetch
P3: Update getSentryHub() to use getCurrentScope() for Sentry SDK 8.x

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

packages/api/src/server.ts

@@ -1,3 +1,5 @@
+// dd-trace must be initialized before any other module is loaded for auto-instrumentation
+import '@shieldai/monitoring/datadog-init';
 import Fastify from "fastify";
 import cors from "@fastify/cors";
 import helmet from "@fastify/helmet";
@@ -11,13 +13,9 @@ 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, initDatadogLogs, captureSentryError } from "@shieldai/monitoring";
+import { captureSentryError } from "@shieldai/monitoring";
 import { getCorsOrigins } from "./config/api.config";
 
-initDatadog();
-initSentry();
-initDatadogLogs();
-
 const app = Fastify({
   logger: {
     level: process.env.LOG_LEVEL || "info",