Severity: low (dead code) + correctness (format string bug)
- Remove unused error_msg variable (parsed JSON but result discarded)
- Fix format string: "()" should be "({})" so _session_path is
actually included in the debug log instead of being silently discarded
AI-assisted: OpenCode / Claude Opus 4.6
Signed-off-by: Yaniv Kaul <yaniv.kaul@scylladb.com>