#3697 fix: Make the `Sink.clean_up()` method a no-op by default Pull request opened by edgarrmondragon This is to avoid forcing users to call

super().clean_up()

in their implementation. TIL that this called the "Template Method", and it is something we should probably do in most of our explicitly public APIs. Summary by Sourcery Introduce a finalized sink shutdown step that preserves metrics behavior while making

clean_up()

a no-op by default. Enhancements: • Add a final

_clean_up()

method on sinks to handle end-of-stream cleanup and metric exit calls. • Change target draining logic to invoke the new sink

_clean_up()

method instead of

clean_up()

. Build: • Update Ruff pre-commit hook and required Ruff version to 0.15.21 in tooling configuration. meltano/sdk