chore(sync): mirror backend .py + Dockerfile to Space (hf-sync-backend)

Automated backend sync from szl-holdings/a11oy main via hf-sync-backend.
Updated (differed from the Space): a11oy_ayllu.py
Deleted (gone from the repo + Dockerfile COPY set): (none)

Keeps the Space-built backend (serve.py + the Dockerfile-COPY'd .py
modules) identical to GitHub main so the Space never rebuilds from a
stale backend, new endpoints don't 404 there, and orphaned modules
removed from the repo don't linger in the Space tree.

a11oy_ayllu.py

@@ -29,6 +29,20 @@ import time
 import uuid
 from typing import Any, Dict, Optional
 
+# FastAPI resolves endpoint annotations with get_type_hints against THIS module's
+# globals. The handlers in register() annotate `request: "Request"` — a string
+# forward-ref, because of `from __future__ import annotations` above — so `Request`
+# (and the response classes) MUST be importable at MODULE level, or FastAPI cannot
+# recognize the special Request parameter and mis-treats it as a REQUIRED query
+# param (every GET route then 422s with loc=["query","request"]). They are also
+# imported locally inside register() for the call sites; this module-level (guarded)
+# import is solely what makes the string annotations resolvable at route-build time.
+try:
+    from fastapi import Request  # noqa: F401
+    from fastapi.responses import HTMLResponse, JSONResponse  # noqa: F401
+except Exception:  # pragma: no cover - fastapi absent only where register() is never called
+    Request = HTMLResponse = JSONResponse = None  # type: ignore
+
 try:
     import szl_dsse as _dsse  # type: ignore
 except Exception:  # pragma: no cover