Add unit tests for orchestration modules

[nikolasdehor]

Test coverage for orchestration: agent-invoker, checklist-runner, cli-commands, condition-evaluator, context-manager, dashboard-integration, execution-profile-resolver, executor-assignment, gate-evaluator, parallel-executor, recovery-handler, skill-dispatcher, subagent-prompt-builder, surface-checker, tech-stack-detector, circuit-breaker.

[nikolasdehor]

Fechando — cobertura de testes de orchestration agora é feita por PRs individuais focados (#467, #468, #470, #474, #478, #503, #534, #535).