- Extract extractListId to src/lib/extract-list-id.ts with proper tests
- Add json-full/includeRaw test for list timeline
- Add 404 retry tests for getOwnedLists and getListMemberships
- Add tests for skipping invalid list entries and missing owner handling
- Use shared TwitterClientPrivate type from fixtures
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Co-Authored-By: Claude Opus 4.5 <[email protected]>