Summary

Fixes #23860

After PR #23905 fixed code actions appearing in non-Python documents, the noqa hover tooltip still appeared in markdown files. For example, hovering over # noqa: RUF100 in a markdown file would show a tooltip explaining the RUF100 rule, even though # is a heading marker in markdown, not a Python comment.

Added a SourceType::Python guard at the top of the hover() function, following the same pattern used in code_action.rs.

Test Plan

Added two unit tests in hover.rs:

• no_hover_for_markdown: opens a .md file containing # noqa: RUF100 and verifies hover returns None
• hover_for_python_noqa: opens a .py file containing # noqa: RUF100 and verifies hover returns a tooltip

To run the tests:

cd /home/ubuntu/Music/ruff
CARGO_PROFILE_DEV_OPT_LEVEL=1 cargo test -p ruff_server -- "hover::tests"

Expected output:

running 2 tests
test server::api::requests::hover::tests::no_hover_for_markdown ... ok
test server::api::requests::hover::tests::hover_for_python_noqa ... ok

test result: ok. 2 passed; 0 failed;