fix: server auto-loads quantumrag.yaml + language auto in yaml

Root cause: quantumrag.yaml had language="ko" hardcoded, and server
didn't auto-load this file — used QuantumRAGConfig.default() instead.

Fixes:
- quantumrag.yaml: language "ko" → "auto"
- Server auto-detects quantumrag.yaml / quantumrag-local.yaml in CWD
- English questions now get English answers

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: unamedkr

datasets/run_qa_combined.py

@@ -48,10 +48,10 @@
 from quantumrag.core.engine import Engine
 
 # --- Config ---
-QUERY_TIMEOUT = 90  # Allow post-correction pipeline to complete
-CONCURRENCY = 5  # Parallel queries
-INGEST_MODE = "fast"  # Skip HyPE/preambles
-SAMPLE_PER_DATASET = 5  # Sample N questions per dataset for speed (0 = all)
+QUERY_TIMEOUT = 120  # Extended for full-mode queries
+CONCURRENCY = 3  # Reduce to avoid Gemini rate limits
+INGEST_MODE = "full"  # Full Triple Index (Original + HyPE + BM25)
+SAMPLE_PER_DATASET = 0  # Full 105q baseline
 NOISE_DOCS = 50  # Noise docs for scale testing. Uses local embeddings, no API cost.
 
 # --- Collect all datasets ---

quantumrag/api/server.py

@@ -135,7 +135,15 @@ def create_app(config_path: str | None = None) -> FastAPI:
     from quantumrag.core.config import QuantumRAGConfig
     from quantumrag.core.engine import Engine
 
-    # Load configuration
+    # Load configuration — auto-detect quantumrag.yaml in current directory
+    if not config_path:
+        from pathlib import Path
+
+        for candidate in ["quantumrag.yaml", "quantumrag-local.yaml"]:
+            if Path(candidate).exists():
+                config_path = candidate
+                break
+
     if config_path:
         cfg = QuantumRAGConfig.from_yaml(config_path)
     else: