vscode-extensions: Skips marketplace validation-failed extension versions

Adds a check to filter out extension versions that failed marketplace validation (e.g., virus scan failures). These invalid versions are hidden from the marketplace UI and lack VsixSignature assets, so selecting them could cause issues. The updater now logs debug information when skipping such versions for better traceability.

pkgs/by-name/vs/vscode-extension-update/vscode_extension_update.py

@@ -239,6 +239,21 @@ class VSCodeExtensionUpdater:
             logger.exception(e)
             sys.exit(1)
 
+    def _version_passed_validation(self, version_info: dict) -> bool:
+        """
+        Returns False when the marketplace reports a validation failure for this
+        version (e.g. virus scan). Such versions are hidden from the marketplace
+        UI and have no VsixSignature asset, so we must not select them.
+        """
+        message = version_info.get("validationResultMessage")
+        if not message:
+            return True
+        try:
+            results = json.loads(message).get("results", [])
+        except (json.JSONDecodeError, AttributeError):
+            return False
+        return not any(r.get("status") == "failure" for r in results)
+
     def find_compatible_extension_version(
         self, extension_versions: list, target_platform: str
     ) -> str:
@@ -250,6 +265,12 @@ class VSCodeExtensionUpdater:
             if candidate_platform is not None and candidate_platform != target_platform:
                 continue
             candidate_version = version_info.get("version")
+            if not self._version_passed_validation(version_info):
+                logger.debug(
+                    f"Skipping version {candidate_version} ({candidate_platform}): "
+                    "marketplace validation failed"
+                )
+                continue
             candidate_pre_release = next(
                 (
                     prop.get("value")