Adding archived flag to augmented parts, fixing migrations so that creation from scratch is successful

app/crud/imported_part.py

@@ -105,11 +105,6 @@ async def count_filtered(db: AsyncSession, description: str = "") -> int:
     return result.scalar_one()
 
 
-async def delete(db: AsyncSession, part: ImportedPart) -> None:
-    await db.delete(part)
-    await db.commit()
-
-
 async def upsert_bulk(db: AsyncSession, records: list[dict]) -> tuple[int, int]:
     """Insert-or-update records keyed on InventoryID. Returns (created, updated)."""
     if not records: