Establish Fleet workstream doctrine under mvp-20260312: north star (incl.
fleet-as-means-of-production), Phase-2 observability PRD, workstream tasks,
and scratchpad. Collision-safe: scoped to docs/fleet/, touches none of the
MVP single-writer control-plane files.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01RMoEx7hfdFGjUiCHuN1RRi
