Update test results directory structure and enhance Docker configurations

- Modified `.gitignore` to reflect the new path for test results.
- Updated `docker-compose.test.yml` to mount the correct test results directory.
- Adjusted `Dockerfile.test` to set the `PYTHONPATH` and ensure test results are saved in the updated location.
- Added `boto3` and `netron` to `requirements-test.txt` to support new functionalities.
- Updated `pytest.ini` to include the new `pythonpath` for test discovery.

These changes streamline the testing process and ensure compatibility with the updated directory structure.

.cursor/skills/refactor/phases/03-safety-net.md

@@ -1,23 +1,45 @@
 # Phase 3: Safety Net
 
 **Role**: QA engineer and developer
-**Goal**: Design and implement tests that capture current behavior before refactoring
+**Goal**: Ensure tests exist that capture current behavior before refactoring
 **Constraints**: Tests must all pass on the current codebase before proceeding
 
-## 3a. Design Test Specs
+## Skip Condition: Testability Refactoring
 
-Coverage requirements (must meet before refactoring — see `.cursor/rules/cursor-meta.mdc` Quality Thresholds):
-- Minimum overall coverage: 75%
-- Critical path coverage: 90%
-- All public APIs must have blackbox tests
-- All error handling paths must be tested
+If the current run name contains `testability` (e.g., `01-testability-refactoring`), **skip Phase 3 entirely**. The purpose of a testability run is to make the code testable so that tests can be written afterward. Announce the skip and proceed to Phase 4.
 
-For each critical area, write test specs to `REFACTOR_DIR/test_specs/[##]_[test_name].md`:
+## 3a. Check Existing Tests
+
+Before designing or implementing any new tests, check what already exists:
+
+1. Scan the project for existing test files (unit tests, integration tests, blackbox tests)
+2. Run the existing test suite — record pass/fail counts
+3. Measure current coverage against the areas being refactored (from `RUN_DIR/list-of-changes.md` file paths)
+4. Assess coverage against thresholds:
+   - Minimum overall coverage: 75%
+   - Critical path coverage: 90%
+   - All public APIs must have blackbox tests
+   - All error handling paths must be tested
+
+If existing tests meet all thresholds for the refactoring areas:
+- Document the existing coverage in `RUN_DIR/test_specs/existing_coverage.md`
+- Skip to the GATE check below
+
+If existing tests partially cover the refactoring areas:
+- Document what is covered and what gaps remain
+- Proceed to 3b only for the uncovered areas
+
+If no relevant tests exist:
+- Proceed to 3b for full test design
+
+## 3b. Design Test Specs (for uncovered areas only)
+
+For each uncovered critical area, write test specs to `RUN_DIR/test_specs/[##]_[test_name].md`:
 - Blackbox tests: summary, current behavior, input data, expected result, max expected time
 - Acceptance tests: summary, preconditions, steps with expected results
 - Coverage analysis: current %, target %, uncovered critical paths
 
-## 3b. Implement Tests
+## 3c. Implement Tests (for uncovered areas only)
 
 1. Set up test environment and infrastructure if not exists
 2. Implement each test from specs
@@ -25,11 +47,11 @@ For each critical area, write test specs to `REFACTOR_DIR/test_specs/[##]_[test_
 4. Document any discovered issues
 
 **Self-verification**:
-- [ ] Coverage requirements met (75% overall, 90% critical paths)
+- [ ] Coverage requirements met (75% overall, 90% critical paths) across existing + new tests
 - [ ] All tests pass on current codebase
-- [ ] All public APIs have blackbox tests
+- [ ] All public APIs in refactoring scope have blackbox tests
 - [ ] Test data fixtures are configured
 
-**Save action**: Write test specs; implemented tests go into the project's test folder
+**Save action**: Write test specs to RUN_DIR; implemented tests go into the project's test folder
 
 **GATE (BLOCKING)**: ALL tests must pass before proceeding to Phase 4. If tests fail, fix the tests (not the code) or ask user for guidance. Do NOT proceed to Phase 4 with failing tests.