error_status_code only read status_code, so a ProxyException raised
before routing (which stores its status as the string code) answered
500 with its 4xx type through the rerank, images, realtime, files, and
pass-through tails. It now falls back to a decimal code. A 408 maps to
timeout_error instead of invalid_request_error.
Tail regressions for rerank, images, realtime calls, and the chat
pass-through fail at the merge base with ('None', 'None'); the new
files-test helpers are fully typed.
Every field of a multipart form arrives as a string, so `n` reached the
provider as "2" and Bedrock Nova Canvas rejected the request with
"expected type: Number, found: String". Restore the type the request
schema declares at the boundary where the form is parsed, driven by the
schema's own type hints so the helper covers any int- or float-typed
field on any multipart endpoint.
