fix: pass actually fetched OIDs to process_newly_available_git_data

Previously, sync_identifier_from_url passed all needed OIDs to
process_newly_available_git_data, not just the OIDs that were
successfully fetched. This caused incorrect logging (new_oids_count
would show all needed OIDs, not just fetched ones).

While this didn't break functionality (the actual processing uses
can_apply_state which checks the repository on disk), it made
debugging confusing.

Changes:
- Rename oids_fetched to fetched_oids and change type from usize to Vec<String>
- Return Vec<String> from match arms instead of counts
- Pass fetched_oids (not needed_oids) to process_newly_available_git_data
- Return fetched_oids.len() at the end

This ensures logging accurately reflects which OIDs were actually
fetched from the remote.

0 files changed, 0 insertions, 0 deletions