feat: harden gateway with policy engine, secure tools, and governance docs

src/aegis_gitea_mcp/request_context.py

@@ -0,0 +1,17 @@
+"""Request context utilities for correlation and logging."""
+
+from __future__ import annotations
+
+from contextvars import ContextVar
+
+_REQUEST_ID: ContextVar[str] = ContextVar("request_id", default="-")
+
+
+def set_request_id(request_id: str) -> None:
+    """Store request id in context-local state."""
+    _REQUEST_ID.set(request_id)
+
+
+def get_request_id() -> str:
+    """Get current request id from context-local state."""
+    return _REQUEST_ID.get()