`test_rotate_handler_no_crash` permanently replaced
`sys.modules["schemas.tool_schemas"].TOOL_SCHEMAS` with `[]`, leaking into
later tests. When test_wire_connectivity (or any test) ran after this one
and did `from schemas.tool_schemas import TOOL_SCHEMAS`, it got the empty
list and `TOOL_SCHEMAS["get_wire_connections"]` raised `TypeError: list
indices must be integers or slices, not str`.
Save the original sys.modules entries and restore them in a `finally`
block so the stubs are scoped to the test body. Whole suite now passes
(678 tests, previously 4 failed in TestSchema when run in suite order).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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