feat(integrations): setup integrations service structure

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

services/integrations/app/main.py

@@ -0,0 +1,17 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+app = FastAPI(title="WhatsApp Central - Integrations Service")
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+@app.get("/health")
+def health_check():
+    return {"status": "healthy", "service": "integrations"}