Integrate data migration into FastAPI lifespan (Task 3)

src/server/fastapi_app.py

@@ -67,6 +67,23 @@ async def lifespan(app: FastAPI):
         except Exception as e:
             logger.warning("Failed to load config from config.json: %s", e)
 
+        # Run data file to database migration
+        try:
+            from src.server.services.startup_migration import (
+                ensure_migration_on_startup,
+            )
+            migration_result = await ensure_migration_on_startup()
+            if migration_result:
+                logger.info(
+                    "Data migration complete: %d migrated, %d skipped, %d failed",
+                    migration_result.migrated,
+                    migration_result.skipped,
+                    migration_result.failed
+                )
+        except Exception as e:
+            logger.error("Data migration failed: %s", e, exc_info=True)
+            # Continue startup - migration failure should not block app
+
         # Initialize progress service with event subscription
         progress_service = get_progress_service()
         ws_service = get_websocket_service()