skillscript-runtime v0.21.2

Upgrade impact: none (additive)

• Fix: dashboard /approve now re-registers a skill's declarative triggers in the live scheduler. Approving a cron/event skill from the dashboard signed and stored it Approved but did not re-add its # Triggers: to the running scheduler. So a skill that was edited (which in secured mode forces it back to Draft, dropping its triggers) and then approved in the browser ended up Approved-but-trigger-less: absent from the Triggers view and silently not firing. The dashboard approve path now syncs declarative triggers the same way the MCP skill_status path does, and the scheduler is now wired to the dashboard unconditionally (previously only when /event ingress was enabled). Existing approvals are unaffected; the fix applies to subsequent dashboard approvals. (A process restart already re-registered them at startup — that workaround is no longer needed.)
• Docs: trimmed the README + landing page of reference-detail that belongs in the deeper docs; corrected the skillfile audit CLI signature; and the per-release Upgrade impact: convention plus a new UPGRADING.md (pre-1.0 transition guide) now ship in the published package.