feat: sync upstream commits up to f17c92bc

feat: apply upstream commits f077c358, 8696e132, cb5b4305

fix(api): allow unauthenticated GET to root path for HF Space health pings

feat: intercept 404s to return 200 OK for scanner bots

fix(compatibility): resolve python 3.12 compatibility NameErrors and SyntaxErrors

feat: synchronize proxy with upstream commits up to 5305bd7 and integrate NIM key rotator

fix: replace super() with explicit calls to prevent async Python 3.12+ bug and suppress HEAD / logs

Fix: Bypass think_parser to emit raw thinking tags as plain text when reasoning isn't explicitly requested by client

Fix _PrefetchedStream asyncio task cancellation bug

Fix HF Space timeouts and infinite rotation loops

Support x-api-key for auth in addition to Bearer tokens to fix Claude Code compatibility

Allow unauthenticated GET to root path so HF Space UI ping doesn't return 401

Deploy latest upstream with key rotation, vision adapter, and HF configs

fix: change timeout_s to http_read_timeout in Nim Provider initialization

Deploy to Hugging Face Space