borg debug format-obj hardcodes ROBJ_FILE_STREAM, should support all repo object types

[mr-raj12]

Summary

• do_debug_format_obj in src/borg/archiver/debug_cmd.py:268 hardcodes the repo object type to ROBJ_FILE_STREAM
• The TODO at line 268: # TODO: support misc repo object types other than ROBJ_FILE_STREAM
• This breaks the debug round-trip (get-obj → parse-obj → [edit] → format-obj → put-obj) for non-file-stream objects
• borg debug parse-obj already handles all object types (uses ROBJ_DONTCARE) and outputs the "type" field in the metadata JSON
• RepoObj.format() is fully generic and accepts any ro_type

Current state

Debug command	Object type support
debug parse-obj	All types (ROBJ_DONTCARE)
debug format-obj	ROBJ_FILE_STREAM only (hardcoded)
debug get-obj / debug put-obj	Raw bytes (no type handling)

All 6 repo object types exist (constants.py): ROBJ_MANIFEST, ROBJ_ARCHIVE_META, ROBJ_ARCHIVE_CHUNKIDS, ROBJ_ARCHIVE_STREAM, ROBJ_FILE_STREAM,
ROBJ_DONTCARE.

Proposed fix

Extract ro_type from the metadata dict, matching the pattern already used in repo_compress_cmd.py:46:

ro_type = meta.pop("type", ROBJ_FILE_STREAM)
data_encrypted = repo_objs.format(id=id, meta=meta, data=data, ro_type=ro_type)

┌────────────────────────────────┬───────────────────────────────────────────────────────────────────────────┐
│              File              │                                  Change                                   │
├────────────────────────────────┼───────────────────────────────────────────────────────────────────────────┤
│ src/borg/archiver/debug_cmd.py │ Extract ro_type from metadata JSON instead of hardcoding ROBJ_FILE_STREAM │
└────────────────────────────────┴───────────────────────────────────────────────────────────────────────────┘

References

• TODO in src/borg/archiver/debug_cmd.py:268
• Existing pattern: src/borg/archiver/repo_compress_cmd.py:46
• Original debug commands: add debug commands for repoobj id_hash/parse/format #7406