Refactoring Mocks to Fakes

Remove unittest.mock.patch from tests by making source code inject gateway dependencies, then configuring pre-canned fakes in tests.

Use this skill when: A test imports from unittest.mock import patch or uses @patch(...) decorators.

Key principle: Don't stop at the lowest-level matching gateway. Look for a higher-level abstraction that covers ALL the things being mocked together.

Phase 1: Audit Mock Usage

Read the test file. For each patch(...) call, record: