Fix bug where seed.py won't fail if no spreadsheet is present.

backend/app/seed.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 from collections import Counter
 from datetime import date, datetime
+import logging
 from pathlib import Path
 import re
 
@@ -21,6 +22,7 @@ TENANT_ID = "hunter-premium-produce"
 WORKBOOK_EFFECTIVE_DATE = date(2025, 9, 1)
 WORKBOOK_SENTINEL_ITEM_ID = "404266"
 WORKBOOK_PATH = Path(__file__).resolve().parents[2] / "Input Cost Spreadsheet(1).xlsx"
+logger = logging.getLogger("data_entry_app.seed")
 
 
 def _text(value) -> str | None:
@@ -681,7 +683,10 @@ def seed_costing_workspace(db):
 def seed_if_empty():
     Base.metadata.create_all(bind=engine)
     with SessionLocal() as db:
-        seed_costing_workspace(db)
+        if WORKBOOK_PATH.exists():
+            seed_costing_workspace(db)
+        else:
+            logger.warning("Skipping costing workspace seed because workbook is missing at %s", WORKBOOK_PATH)
         seed_client_access(db)
         db.commit()