Group 1 - Dual validation rejection (9 tests):
_check_dual_validation: any single rejection is a veto (r or b == rejected
-> rejected). Removes the disputed state transition that broke tests expecting
immediate rejection when one lead rejects.
Group 2 - Reopen clears notes (2 tests):
reopen_test service was intentionally keeping red/blue validation notes but
tests (and TestEntity.reopen domain method) expect them cleared. Align service
with domain entity behavior.
Group 3 - Audit integrity hash (2 tests):
log_action: call db.refresh(entry) after initial flush and before computing
the HMAC hash. Without this, a DB round-trip (commit + refresh in tests)
retrieves a timestamp with different string representation, causing mismatch.
Group 4 - Tempo service API (3 tests):
- auto_log_test_worklog: make duration_seconds optional (default None) and
compute from test.red_started_at -> updated_at when not supplied.
- Add get_tempo_client() that raises InvalidOperationError when disabled,
matching what tests expect.
- test_tempo_service: set tempo_api_token/jira_account_id on admin_user so
the service proceeds past the has_tempo_configured guard.
Coverage threshold: change min_validated_for_full from 2 to 1 so that a single
fully dual-validated detected test yields TechniqueStatus.validated, matching
test_coverage_correct_after_dual_validation expectations.