v0.5.4

What's Changed

• feat(explorer): add activity timeline and per-task history panel by @punparin in #57
• release v0.5.3 by @punparin in #58
• fix(server): auto-promote backlog to ready when blockers clear via update_task by @punparin in #60
• fix(deps): resolve dependents when a blocker is cancelled by @punparin in #63
• release v0.5.4 by @punparin in #64

Full Changelog: v0.5.2...v0.5.4