refactor: remove subagent references and update CLI tool usage across documentation

.claude/skills/team-lifecycle-v2/role-specs/executor.md

@@ -3,7 +3,6 @@ role: executor
 prefix: IMPL
 inner_loop: true
 discuss_rounds: []
-subagents: []
 message_types:
   success: impl_complete
   progress: impl_progress

.claude/skills/team-lifecycle-v2/role-specs/fe-developer.md

@@ -3,7 +3,6 @@ role: fe-developer
 prefix: DEV-FE
 inner_loop: false
 discuss_rounds: []
-subagents: []
 message_types:
   success: dev_fe_complete
   progress: dev_fe_progress

.claude/skills/team-lifecycle-v2/role-specs/fe-qa.md

@@ -3,7 +3,6 @@ role: fe-qa
 prefix: QA-FE
 inner_loop: false
 discuss_rounds: []
-subagents: []
 message_types:
   success: qa_fe_passed
   result: qa_fe_result

.claude/skills/team-lifecycle-v2/role-specs/planner.md

@@ -3,7 +3,6 @@ role: planner
 prefix: PLAN
 inner_loop: true
 discuss_rounds: []
-subagents: []
 message_types:
   success: plan_ready
   revision: plan_revision

.claude/skills/team-lifecycle-v2/role-specs/tester.md

@@ -3,7 +3,6 @@ role: tester
 prefix: TEST
 inner_loop: false
 discuss_rounds: []
-subagents: []
 message_types:
   success: test_result
   fix: fix_required