GET api update for image vector

serve.py

@@ -117,6 +117,14 @@ def _run() -> int:
         # an https request.
         proxy_headers=True,
         forwarded_allow_ips="*",
+        # Request line + headers ceiling. h11's default is 16 KB, and the GET
+        # form of the image search (GET /api/search/image-vector) carries a
+        # 1024-float vector in the query string: 5.5 KB as base64, 8-10 KB
+        # comma-separated - which with a browser's cookies and headers can
+        # cross 16 KB and be dropped before the app sees it. 64 KB keeps that
+        # working and is still a tight bound against header abuse. (The
+        # keyword is uvicorn's; a rename would fail loudly here at boot.)
+        h11_max_incomplete_event_size=64 * 1024,
     )
     uvicorn.Server(config).run(sockets=sockets)
     return 0