v0.5.1

Added

• Add sanitized end-to-end status payload and wire fixtures, bounded 50 MiB
  wire catch-up coverage, and a Node 18/20/22 CI matrix.

Changed

• Split the executable into command routing, a configuration management
  service, and a budgeted render runtime. Render frames now share one config
  snapshot and a 220ms internal deadline across stdin, metrics, quota refresh,
  and Git collection.
• Split metrics into state migration/storage, session location, bounded wire
  reading, and throughput, turn, compaction, cache, goal, and session metadata
  reducers. Metrics state v8 caps aggregate wire reads at 1 MiB per frame,
  rotates subagent priority, preserves split UTF-8 lines, and incrementally
  replaces historical projections after they catch up.

Fixed

• Fail closed when the SessionStart hook cannot safely parse a status-line
  command, and quote generated commands whose paths contain spaces or shell
  metacharacters.
• Make management command failures observable through stderr and exit status,
  while preserving render and detached-refresh silent fallbacks.
• Classify quota failures so authorization errors clear stale data while
  transient errors retain it, and make refresh locking atomic and
  ownership-safe.
• Preserve zero-valued quota windows when the usages API omits used, deriving
  it from limit - remaining so the percentage and reset countdown stay visible.
• Keep stale TPS medians inside their owning agent bucket and fully reset an
  agent when its wire rotates or truncates.