docs: Reorder track queue and initialize final stabilization tracks

- Initialize asyncio_decoupling_refactor_20260306 track

- Initialize mock_provider_hardening_20260305 track

- Initialize simulation_fidelity_enhancement_20260305 track

- Update TASKS.md and tracks.md to reflect new strict execution queue

- Archive completed tracks and remove deprecated test performance track

conductor/tracks/mock_provider_hardening_20260305/plan.md

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+# Implementation Plan: Mock Provider Hardening (mock_provider_hardening_20260305)
+
+## Phase 1: Mock Script Extension
+- [ ] Task: Initialize MMA Environment `activate_skill mma-orchestrator`
+- [ ] Task: Add `MOCK_MODE` to `mock_gemini_cli.py`
+    - [ ] WHERE: `tests/mock_gemini_cli.py`
+    - [ ] WHAT: Implement conditional branches based on `MOCK_MODE` environment variable.
+    - [ ] HOW: Support `success`, `malformed_json`, `error_result`, and `timeout`.
+    - [ ] SAFETY: Ensure it still defaults to `success` to not break existing tests.
+- [ ] Task: Conductor - User Manual Verification 'Phase 1: Mock Extension'
+
+## Phase 2: Negative Path Testing
+- [ ] Task: Write `test_negative_flows.py`
+    - [ ] WHERE: `tests/test_negative_flows.py`
+    - [ ] WHAT: Write tests that launch `live_gui`, inject `MOCK_MODE` via `ApiHookClient` custom callback or `env` dictionary, and assert the UI gracefully handles the failure.
+    - [ ] HOW: Use `wait_for_event('response')` and check that the payload status is `"error"`.
+    - [ ] SAFETY: Ensure `timeout` tests don't actually hang the test suite for 120s (configure the timeout shorter if possible in test setup).
+- [ ] Task: Conductor - User Manual Verification 'Phase 2: Negative Tests'
+
+## Phase 3: Final Validation
+- [ ] Task: Full Suite Validation
+    - [ ] WHERE: Project root
+    - [ ] WHAT: `uv run pytest`
+    - [ ] HOW: Ensure 100% pass rate.
+    - [ ] SAFETY: None.
+- [ ] Task: Conductor - User Manual Verification 'Phase 3: Final Validation'