chore: consolidate platform split checks

src/govoplan_core/server/fastapi.py

@@ -4,10 +4,12 @@ from collections.abc import AsyncIterator, Callable, Iterable
 from contextlib import AbstractAsyncContextManager
 from typing import Any
 
-from fastapi import APIRouter, FastAPI
+from fastapi import APIRouter, FastAPI, Request
 from fastapi.middleware.cors import CORSMiddleware
 
+from govoplan_core.core.events import event_context, new_event_id, normalize_trace_id
 from govoplan_core.core.registry import PlatformRegistry
+from govoplan_core.server.conditional_requests import conditional_json_get_middleware
 
 LifespanFactory = Callable[[FastAPI], AbstractAsyncContextManager[None] | AsyncIterator[None]]
 
@@ -25,6 +27,20 @@ def create_govoplan_app(
     app = FastAPI(title=title, version=version, lifespan=lifespan)
     app.state.govoplan_registry = registry
 
+    @app.middleware("http")
+    async def request_correlation_context(request: Request, call_next):
+        correlation_id = (
+            normalize_trace_id(request.headers.get("x-correlation-id"))
+            or normalize_trace_id(request.headers.get("x-request-id"))
+            or new_event_id()
+        )
+        with event_context(correlation_id=correlation_id):
+            response = await call_next(request)
+        response.headers["X-Correlation-ID"] = correlation_id
+        return response
+
+    app.middleware("http")(conditional_json_get_middleware)
+
     origins = [item.strip() for item in cors_origins if item.strip()]
     if origins:
         app.add_middleware(