docs: Update remaining track plans with test architecture debt warnings

- Add test debt notes to concurrent_tier, manual_ux, and async_tool tracks to guide testing strategies away from live_gui where appropriate.

conductor/tracks/async_tool_execution_20260303/plan.md

@@ -1,5 +1,7 @@
 # Implementation Plan: Asynchronous Tool Execution Engine (async_tool_execution_20260303)
 
+> **TEST DEBT FIX:** Due to ongoing test architecture instability (documented in `test_architecture_integrity_audit_20260304`), do NOT write new `live_gui` integration tests for this track. Use purely in-process mocks to verify concurrency logic.
+
 ## Phase 1: Engine Refactoring
 - [ ] Task: Initialize MMA Environment `activate_skill mma-orchestrator`
 - [ ] Task: Refactor `mcp_client.py` for async execution

conductor/tracks/concurrent_tier_source_tier_20260302/plan.md

@@ -1,5 +1,7 @@
 # Implementation Plan: Concurrent Tier Source Isolation (concurrent_tier_source_tier_20260302)
 
+> **TEST DEBT FIX:** Due to ongoing test architecture instability (documented in `test_architecture_integrity_audit_20260304`), do NOT write new `live_gui` integration tests for this track. Rely strictly on in-process `unittest.mock` for `ai_client` concurrency verification.
+
 ## Phase 1: Thread-Local Context Refactoring
 - [ ] Task: Initialize MMA Environment `activate_skill mma-orchestrator`
 - [ ] Task: Refactor `ai_client` to `threading.local()`

conductor/tracks/manual_ux_validation_20260302/plan.md

@@ -1,5 +1,7 @@
 # Implementation Plan: Manual UX Validation & Polish (manual_ux_validation_20260302)
 
+> **TEST DEBT NOTE:** This track is explicitly manual/visual and naturally bypasses the current `live_gui` automated testing debt (documented in `test_architecture_integrity_audit_20260304`). 
+
 ## Phase 1: Observation Harness Setup
 - [ ] Task: Initialize MMA Environment `activate_skill mma-orchestrator`
 - [ ] Task: Create Slow-Mode Simulation