Potential fix for pull request finding 'CodeQL / Clear-text logging of sensitive information'

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: sylvinus

src/backend/core/services/tiered_storage.py

@@ -194,11 +194,10 @@ def upload_blob(self, blob: "Blob") -> int:
         self.storage.save(key, ContentFile(content))
 
         logger.info(
-            "Uploaded blob %s to object storage: %s (%d bytes, key_id=%d)",
+            "Uploaded blob %s to object storage: %s (%d bytes)",
             blob.id,
             key,
             len(content),
-            blob.encryption_key_id,
         )
 
         # Return blob's existing encryption_key_id (unchanged)