#3058 feat(cli): track init onboarding journeys

Summary

• add per-invocation run IDs and resumable journey IDs to classic capgo init
• persist resume lineage and enrich existing onboarding-v2 milestones plus lifecycle boundaries
• preserve terminal replay, analytics opt-out, and the existing markSnag/sendEvent delivery path

Scope

• classic capgo init only; no build init, frontend, backend, replay delivery, or generic prompt instrumentation changes
• 460 additions and 30 deletions (490 total changed lines)

Test plan

• bun run cli:check
• focused init telemetry, replay, guardrail, and analytics suites
• CLI lint, typecheck, build, and final whole-change review

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Summary by CodeRabbit

• New Features

  • Added telemetry for CLI initialization, including milestones, resume and restart tracking, app scoping, and explicit completion, cancellation, or failure outcomes.
  • Preserved telemetry metadata across resumed sessions and supported replay-session correlation.
  • Added telemetry opt-out support; analytics failures do not interrupt initialization.

• Documentation

  • Added a design specification covering initialization telemetry identities, events, persistence, and opt-out behavior.

• Tests

  • Added comprehensive coverage for telemetry, progress handling, lifecycle events, and command integration.