Implement `deepseek metrics` as a dispatcher-handled subcommand (no TUI
binary roundtrip) that reads ~/.deepseek/audit.log, session JSON files,
and tasks runtime JSONL event streams, then prints a human-readable
usage rollup aggregated by tool name, compaction events, sub-agent
spawns, and capacity-controller interventions.
Flags: --json (machine-readable) and --since DURATION (e.g. 7d, 24h,
30m, now-2h, 2h30m). Empty/missing audit log exits 0 with an empty
rollup; malformed lines are skipped silently via tracing::trace!.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Hunter Bown
9804c92c21