Bundled upstream support

Supporting files are included at skill-relative paths. See UPSTREAM-NOTICE.md for their pinned sources, licenses, hashes, and import changes.

Restored helper safety

The integration fixture in assets/conftest_template.py connects to the configured Cosmos endpoint; cleanup_test_docs deletes records explicitly added to its tracking list. Use only an isolated disposable test container with test-only records, never production data. Copying the template does not connect to Cosmos.