Hound 9.1.1

Startup reliability + speed release.\n\n- Keeps live-search and reranker imports off the MCP handshake path.\n- Optional prewarm imports now resolve off the event loop, so slow ONNX/Scrapling imports cannot mute initialize.\n- Cached/invalid searches no longer import metasearch, bs4, trafilatura, Scrapling static fetcher, or reranker wrappers.\n- Removed broad unawaited-coroutine RuntimeWarning suppression; real async bugs surface again.\n- Search metadata now says merge instead of stale keyword.\n\nNo new tools, no schema breaks, no response-shape breaks.\n\nVerified: 72 release-critical startup/search/lifecycle tests passed; repeated cold stdio probes initialized in ~0.9-1.1s with exit 0 and empty stderr; wheel and sdist pass twine check.