Test Coverage Matrix: Clean Release

Module	File	TIER	Has Tests	Fixtures	Edges	Invariants
`clean_release.policy_engine`	`policy_engine.py`	CRITICAL	✅ Yes	1/1	3/3	1/1
`clean_release.compliance_orchestrator`	`compliance_orchestrator.py`	CRITICAL	✅ Yes	1/1	3/3	1/1
`clean_release.report_builder`	`report_builder.py`	CRITICAL	✅ Yes	1/1	3/3	1/1
`clean_release.manifest_builder`	`manifest_builder.py`	STANDARD	✅ Yes	N/A	N/A	N/A
`clean_release.source_isolation`	`source_isolation.py`	STANDARD	✅ Yes	N/A	N/A	N/A
`api.routes.clean_release`	`clean_release.py`	STANDARD	✅ Yes	N/A	N/A	N/A
`api.routes.tasks.get_task_logs`	`tasks.py`	CRITICAL	✅ Yes	1/1	3/3	1/1
`models.clean_release`	`clean_release.py`	CRITICAL	✅ Yes	1/1	3/3	1/1
`frontend.assistant_chat.integration`	`assistant_chat.integration.test.js`	CRITICAL	✅ Yes	1/1	3/3	1/1
`frontend.reports.report_card.ux`	`report_card.ux.test.js`	CRITICAL	✅ Yes	1/1	3/3	1/1
`frontend.task_log_viewer`	`task_log_viewer.test.js`	CRITICAL	✅ Yes	1/1	3/3	1/1

CRITICAL Edge Cases Covered

Edge Case	Has Test	Required
policy_engine: `missing_registry_ref`	✅	Yes
policy_engine: `conflicting_registry`	✅	Yes
policy_engine: `external_endpoint`	✅	Yes
compliance_orchestrator: `stage_failure_blocks_release`	✅	Yes
compliance_orchestrator: `missing_stage_result`	✅	Yes
compliance_orchestrator: `report_generation_error`	✅	Yes
report_builder: `empty_violations_for_blocked`	✅	Yes
report_builder: `counter_mismatch`	✅	Yes
report_builder: `missing_operator_summary`	✅	Yes