Respect file exclusions in ruff server (#11590)

## Summary

Closes https://github.com/astral-sh/ruff/issues/11587.

## Test Plan

- Added a lint error to `test_server.py` in `vscode-ruff`.
- Validated that, prior to this change, diagnostics appeared in the
file.
- Validated that, with this change, no diagnostics were shown.
- Validated that, with this change, no diagnostics were fixed on-save.

crates/ruff_server/src/session/index.rs

@@ -479,7 +479,7 @@ impl DocumentQuery {
     }
 
     /// Get the underlying file path for the document selected by this query.
-    pub(crate) fn file_path(&self) -> &PathBuf {
+    pub(crate) fn file_path(&self) -> &Path {
         match self {
             Self::Text { file_path, .. } | Self::Notebook { file_path, .. } => file_path,
         }

crates/ruff_server/src/session/index/ruff_settings.rs

@@ -73,10 +73,17 @@ impl RuffSettings {
         }
     }
 
+    /// Return the [`ruff_workspace::FileResolverSettings`] for this [`RuffSettings`].
+    pub(crate) fn file_resolver(&self) -> &ruff_workspace::FileResolverSettings {
+        &self.file_resolver
+    }
+
+    /// Return the [`ruff_linter::settings::LinterSettings`] for this [`RuffSettings`].
     pub(crate) fn linter(&self) -> &ruff_linter::settings::LinterSettings {
         &self.linter
     }
 
+    /// Return the [`ruff_workspace::FormatterSettings`] for this [`RuffSettings`].
     pub(crate) fn formatter(&self) -> &ruff_workspace::FormatterSettings {
         &self.formatter
     }