Loki Mode v7.19.4

Fixed

• loki crash list now lists crash reports, matching the bare loki crash
  command. Previously only the bare form listed and loki crash list errored
  with "Unknown crash subcommand", which a user mirroring loki proof list or
  loki memory list would hit. Fixed on both routes (bash and Bun) with the
  help text updated to show (none) | list. Found during real-user CLI QA of
  the v7.19.x arc.
• CI reliability: the withFileLock concurrency unit test no longer times out
  on slow CI runners. The advisory file-lock backoff cap was tightened from
  200ms to 50ms (a real throughput improvement under contention for the
  parallel gate-failure call sites), the test polls faster, and it carries an
  explicit generous per-test timeout. The static-analysis parallelism test now
  gates its strict speedup assertion on CPU count, so it does not false-fail on
  a single-core CI cell while still verifying parallelism on multi-core
  machines. No product behavior change beyond the faster lock backoff.