fix(dashboard): cache ROA price status and align nefacturate counts

- Add price_match column to SQLite, cached on order detail view
- Background backfill on startup checks all unchecked imported orders
- Extract _enrich_items_with_codmat() helper to deduplicate SKU enrichment
- Attention card now shows same nefacturate count as filter pill

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

api/app/main.py

@@ -1,3 +1,4 @@
+import asyncio
 from contextlib import asynccontextmanager
 from datetime import datetime
 from fastapi import FastAPI
@@ -8,6 +9,7 @@ import os
 
 from .config import settings
 from .database import init_oracle, close_oracle, init_sqlite
+from .routers.sync import backfill_price_match
 
 # Configure logging with both stream and file handlers
 _log_level = getattr(logging, settings.LOG_LEVEL.upper(), logging.INFO)
@@ -56,6 +58,8 @@ async def lifespan(app: FastAPI):
     except Exception:
         pass
 
+    asyncio.create_task(backfill_price_match())
+
     logger.info("GoMag Import Manager started")
     yield