v0.4.0

What's Changed

• feat: roar tag functionality (CRUD, tag propagation) by @jongeyer in #215
• test(rc/0.4.0): fix 6 failing tests (telemetry env hygiene + register -y) by @christophergeyer in #232
• feat(register): warn when a run/build appears in flight during defaul… by @TrevorBasinger in #229
• feat(tags): add roar tag why provenance walk by @christophergeyer in #231
• feat(tags): support value-level --block-tag KIND=VALUE by @christophergeyer in #234
• feat(show): render tags cleanly + job barriers; hide the bind ledger by @christophergeyer in #236
• feat(tags): enforce canonical kinds with .roarconfig opt-in by @christophergeyer in #233
• feat(tags): record & replay roar run modifiers for reproduction by @christophergeyer in #235
• Release 0.4.0 (rc) by @christophergeyer in #237

Full Changelog: v0.3.7...v0.4.0