Bump timeout for rust diagnostics

(cherry picked from commit c42dcf29a9849e1fe935e5039aebd24e7b1f6cac)

src/solidlsp/language_servers/rust_analyzer.py

@@ -685,6 +685,13 @@ class RustAnalyzer(SolidLanguageServer):
         }
         return initialize_params
 
+    @override
+    def _get_published_diagnostics_wait_timeout(self, pull_diagnostics_failed: bool) -> float:
+        timeout = super()._get_published_diagnostics_wait_timeout(pull_diagnostics_failed)
+        # Rust diagnostics are often published asynchronously after the pull-diagnostics request,
+        # so keep a wider fallback wait window across all platforms.
+        return max(timeout, 4.0)
+
     def _start_server(self) -> None:
         """
         Starts the Rust Analyzer Language Server