Add Task 3.6 routes:
- POST /api/v1/berths/:id/reservations — creates a pending reservation;
the URL berthId is authoritative and any body-supplied berthId is
ignored.
- GET /api/v1/berths/:id/reservations — list filtered by URL berthId.
- GET /api/v1/berth-reservations/:id — fetch scoped to tenant.
- PATCH /api/v1/berth-reservations/:id — action-based dispatch
(activate | end | cancel) via a discriminated union. Because the
required permission depends on the action, PATCH is wrapped with
withAuth only and calls requirePermission inside the handler.
- DELETE /api/v1/berth-reservations/:id — alias for cancel (204).
Cross-tenant berths return 404 on both POST and GET via an explicit
pre-check.
Tests cover happy paths, invalid transitions, 404/400/403 cases, the
URL-vs-body berthId precedence, and per-action permission gating.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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