week6-initial-commit

[mahis1067]

Summary

• complete object-graph transfers.
• pull now discovers both merge parents, nested trees, and all referenced blobs.
• added validation for object hashes and expected object types while reusing valid loose or packed objects.
• added remote integration coverage for packed-only stores, missing descendants, binary/Unicode/empty data, and merge commits.

Validation

• scripts/quality-check.sh
• Manual testing, if applicable:

Checklist

• The change is focused and easy to review.
• Tests were added or updated for behavior changes.
• Documentation was updated for user-facing or setup changes.
• No secrets, generated artifacts, or local-only files are included.

Notes for Reviewers

tests/test_index.py::test_mode_only_change_is_modified_with_no_line_edits
tests/test_index.py::test_cli_mode_only_change

these tests did not pass