Add startup scheme

core/pb_client.py

@@ -147,6 +147,12 @@ async def update_record(record_id: str, data: dict[str, Any]) -> dict[str, Any]:
     )
 
 
+async def get_collection_fields() -> set[str]:
+    """Return the field names defined on the economy collection's schema."""
+    data = await _request("GET", f"{PB_URL}/api/collections/{ECONOMY_COLLECTION}")
+    return {f["name"] for f in data.get("fields", [])}
+
+
 async def count_records() -> int:
     """Return the total number of records in the collection (single cheap request)."""
     data = await _request(