test(fleet): keep the multi-component example as permanent fleet coverage

[joshua-temple]

Problem / why

The two-component example added in V4 should become a permanent member of the fleet so the
schema-2 multi-component path is continuously exercised on every release-candidate fleet run,
not just once at feature time.

Scope (firm intent)

• Promote the V4 two-component example to a permanent fleet coverage case, exercising the full
  lifecycle (versioning, promotion, hotfix, rollback, release) per component.

Files / areas touched

• Fleet configuration and the example repo's suite.

Tests and coverage required

• The example repo runs as part of the standard fleet rotation and stays green.

Acceptance criteria

• The multi-component example is a permanent fleet case covering the full per-component
  lifecycle.

Dependencies

Blocked by R4 and X1 (so the permanent case covers the complete shipped surface).