fix: persist product archive cover and provenance

backend/service/app.py

@@ -1110,11 +1110,6 @@ async def create_product_version(
     except ValueError as exc:
         raise HTTPException(status_code=400, detail=str(exc)) from exc
 
-    source_job_ids = [
-        str(source.get("source_job_id") or "")
-        for source in version.metadata.get("wordcloud_sources", [])
-        if isinstance(source, dict)
-    ]
     rows = product_archive_store._fetchall(
         "SELECT * FROM product_wordcloud_archives WHERE version_id = ? ORDER BY created_at, archive_id",
         (version.version_id,),
@@ -1126,10 +1121,12 @@ async def create_product_version(
             "version_id": row["version_id"],
             "archive_path": row["archive_path"],
             "created_at": datetime.fromisoformat(row["created_at"]),
-            "source_job_id": source_job_id,
+            "source_job_id": row["source_job_id"],
+            "source_asset_id": row["source_asset_id"],
+            "db_checksum": row["db_checksum"],
             "db_path": row["archive_path"],
         }
-        for source_job_id, row in zip(source_job_ids, rows, strict=True)
+        for row in rows
     ]
     return ProductVersionArchiveResponse(
         **version.model_dump(),