v1.6.0 — legacy memory plugin (pre-relaunch)

What's Changed

• fix(openclaw): ack due schedules after heartbeat delivery by @moltar-bot in #29
• feat: schedule diagnostics + lifecycle docs by @tyejcoleman in #30
• fix(openclaw): include plugin manifest in published package by @keyoku-bot in #32
• feat(openclaw): session-aware context curation by @tyejcoleman in #35

Full Changelog: v1.5.0...v1.6.0