[mahis1067]

Summary

Created _parse_object_header in remote.py to parse an OBJ header
Fixing methods in RemoteServer
Fix validate pack method and decode pack record
Fix ObjectStore initializer
Create _read_cached_index
Create benchmark_packfiles.py to measure packing, reads and stores bytes

Tests made

• Tests corrupt loose objects win over valid packed copy
• Tests fresh store lookup modes preserve missing and corrupt distinction
• Tests packed lookup validate every record before returning
• Tests published pack and index version are validated
• Test published pack count and index offset are validated
• Fix test pack publication leaves previous object readable
• Test pack publication failures cleans temporary files
• Test packed index cache discovers new packs
• Test packed index cache rechecks changes pack
• Test fresh store reads multiple packs and objects

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 failed

• test_ref_paths_reject_symlinks_and_file_directory_collisions
• test_mode_only_change_is_modified_with_no_line_edits
• test_cli_mode_only_change
• test_fast_forward_into_fresh_repo_restores_everything
• test_second_fast_forward_applies_edit_delete_new_dir_and_mode
• test_bad_ref_session_does_not_stop_server
• test_bad_ref_session_does_not_stop_server
• test_bad_ref_session_does_not_stop_server