fix: auto-apply safe defaults for missing fields in load_engine_object

[princyballabh]

• Enhanced load_engine_object() to automatically apply safe defaults for missing fields
• Uses existing _get_auto_default_for_type() function to determine safe defaults:
  • Optional[T] → None
  • list[T] → []
  • dict[K,V] → {}
• Respects explicit defaults when available
• Maintains backward compatibility

[georgeh0]

Awesome! Thanks for the PR!

[georgeh0]

Hi @princyballabh,

Thanks for the PR. Would you please rerun precommit hooks, which will automatically reformat files:

pre-commit install
pre-commit run --all-files

[georgeh0]

This resolves #1086