v0.24.0 — model routing and context archiving

A minor release focused on model-routing depth, context lifecycle
management, and operator diagnostics. It adds richer model/provider
metadata, local semantic routing support, a read-safe context archiving
skill, context-consumption reporting, and team/model assignment
infrastructure. No breaking changes are intended for existing consumers.

Added

• Added model-class assignment and richer model/provider characteristics:
  provider, model, version, effort, architecture, license, deployment,
  latency/speed, context length, token accounting, access, rate limits,
  and supported runtime parameters.
• Added get_model_for_class() and class-based routing metadata to the
  model recommender so callers can resolve fast, balanced, deep, and
  specialized model classes consistently.
• Added the context-archiving skill and MCP server for planning and
  creating archive tarballs, extracting archived payloads, and keeping
  archived entities queryable through the index.
• Added archive-aware index metadata via storage_location, including
  archived LogEntry event-query support.
• Added task-router v0.2 scoring with local n-gram semantic matching,
  scoring basis details, and low-confidence LLM-escalation metadata.
• Added context-consumption checkpoint reports and team identity /
  model-assignment bindings for role-based routing.
• Added optional sqlite-vec semantic search and FTS5-backed index search.
• Added a library-expert skill template plus skill-builder and
  skill-reviewer guidance for version-scoped library expertise.

Changed

• Improved processkit routing and MCP ergonomics across task-router,
  skill-finder, model-recommender, and related docs.
• Refined harness diagnostics and pk-doctor drift reporting, including
  server-header drift coverage.
• Updated model schemas in both context/ and src/context/ to carry
  the broader model-characteristics surface.

Fixed

• Fixed artifact metadata updates so callers can avoid restamping
  freshness-sensitive metadata.updated values.
• Restored the docs-site build after the v0.23.1 release line.

Notes

• v0.24.0 is a minor release because it introduces new
  backwards-compatible capabilities. The context-archiving MCP server is
  implemented, but harness registration remains gated on installer sync
  support for new per-skill MCP config entries.
• Pre-release validation on the release branch retains the known optional
  release-audit warnings for unused entity directories (actors/,
  scopes/, gates/) and the known pk-doctor preauth warning gated by
  aibox#55.