PYSEC-2026-3837 GitPython: TagReference.create positional reference bypasses kwargs-only --file guard, enabling arbitrary file read (incomplete fix of 3af0c251)

Summary TagReference.create forwards a caller-influenced positional reference value into git tag without it ever being inspected by the unsafe-option guard, allowing an arbitrary file read the file's contents are returned in-band as the annotated tag message. This is an incomplete-fix bypass of...