Adds free-tier Sentry error reporting to close the biggest observability
gap: automated cron/worker failures were previously invisible (aitmpl-crons
had no error handling at all). Uses a dependency-free fetch()-based Sentry
envelope client (cloudflare-workers/*/sentry.js, dashboard error-tracking.ts,
cli-tool error-reporting.js) instead of the official SDKs, to keep the
zero-dependency worker style and avoid Cloudflare Pages SSR friction.
- Cloudflare Workers: report failures + Cron Monitor check-ins in crons,
pulse, and docs-monitor (complementing, not replacing, existing Telegram
alerts). Also drops the pulse Vercel collector (VERCEL_API/collectVercel),
since the dashboard no longer deploys to Vercel.
- Dashboard: captureApiError() wired into claude-code-check, health-check,
and the three track-* endpoints.
- CLI: opt-in only crash reporting (CCT_ERROR_REPORTING=true), always
deferring to the existing CCT_NO_TRACKING/CCT_NO_ANALYTICS/CI opt-outs.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
daniel