docs(tests): add the documentation-sync TDD evidence report

docs(tests): add the rubric template TDD evidence report

docs(tests): add the Phase 4 provider-layer TDD evidence report

docs(tests): add the Phase 4 deterministic scoring TDD evidence report

docs(testing): add Phase 3 rubric TDD evidence report

docs(testing): add Phase 1.5 TDD evidence report

test(api): add Phase 0-1 suite with 59 tests at 93 percent coverage