v0.5.0

Changelog

• 3f3afa4 docs(memory): Phase 0 hardening + Phase 3a Codex ingestion design spec (#7)
• 2649527 feat(arc-sync): Phase 0 watcher hardening — state v2, directory discovery, bounded reads, 409/413 (PR-0b) (#9)
• c7d0be4 feat(memory): Phase 0 hardening — dedup migration, atomic ingest, bounded extraction, admission queue (PR-0a) (#8)
• f20b423 fix(auth): split skills:write so a publishing key cannot reach every workstation
• ff4c10b test(server): fail the build when a public /api or /mcp route has no auth