fix: configure root logging so INFO logs appear in HF Space

- Add logging.basicConfig(level=INFO) before any imports
- Suppress noisy third-party loggers (httpx, transformers, hf_hub)
- Add startup banner showing pipeline config (LLM, reranker, hybrid, Jina)
- All [RAG], [LiveSearch], [JinaReranker] logs now visible in container logs

src/main.py

@@ -1,5 +1,6 @@
 import os
 import sys
+import logging
 from pathlib import Path
 from contextlib import asynccontextmanager
 
@@ -9,6 +10,25 @@ project_root = current_dir.parent.parent.parent.parent # d:\...pipeline
 sys.path.append(str(project_root))
 sys.path.append(str(current_dir.parent)) # d:\...\rag-api
 
+# ── Configure logging BEFORE any imports that use loggers ────────────────────
+logging.basicConfig(
+    level=logging.INFO,
+    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
+    datefmt="%H:%M:%S",
+    force=True,
+)
+# Suppress noisy third-party loggers
+logging.getLogger("httpx").setLevel(logging.WARNING)
+logging.getLogger("httpcore").setLevel(logging.WARNING)
+logging.getLogger("hf_xet").setLevel(logging.WARNING)
+logging.getLogger("huggingface_hub").setLevel(logging.WARNING)
+logging.getLogger("transformers").setLevel(logging.WARNING)
+logging.getLogger("FlagEmbedding").setLevel(logging.WARNING)
+logging.getLogger("sentence_transformers").setLevel(logging.WARNING)
+logging.getLogger("urllib3").setLevel(logging.WARNING)
+
+logger = logging.getLogger(__name__)
+
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 from src.core.config import settings
@@ -22,13 +42,18 @@ import uvicorn
 @asynccontextmanager
 async def lifespan(app: FastAPI):
     # Startup
+    logger.info("=" * 60)
+    logger.info("ARKI AI RAG API — Pipeline v2.5 starting up")
+    logger.info(f"  LLM provider    : {settings.LLM_PROVIDER}")
+    logger.info(f"  Reranker model  : {settings.RERANKER_MODEL}")
+    logger.info(f"  Hybrid search   : {settings.ENABLE_HYBRID_SEARCH}")
+    logger.info(f"  Jina Reader     : {settings.ENABLE_JINA_READER}")
+    logger.info(f"  Jina Reranker   : {settings.JINA_RERANKER_ENABLED}")
+    logger.info(f"  NewsAPI         : {bool(settings.NEWSAPI_KEY and settings.NEWSAPI_KEY != 'your-newsapi-key-here')}")
+    logger.info("=" * 60)
     init_db()
-    # Pre-warming moved to lazy loading or manual script to prevent 
-    # initialization timeouts/crashes on the first run.
-    # thread = threading.Thread(target=prewarm_models)
-    # thread.start()
     yield
-    # Shutdown (if needed)
+    # Shutdown
     pass