Pass minimal copy of core

src/api-client.ts

@@ -50,8 +50,10 @@ function createApiClientWithDetails(
       baseUrl: apiDetails.apiURL,
       userAgent: `CodeQL-Action/${getActionVersion()}`,
       log: {
-        ...core,
+        debug: core.debug,
+        info: core.info,
         warn: core.warning,
+        error: core.error,
       },
     }),
   );

src/logging.ts

@@ -13,7 +13,15 @@ export interface Logger {
 }
 
 export function getActionsLogger(): Logger {
-  return core;
+  return {
+    debug: core.debug,
+    info: core.info,
+    warning: core.warning,
+    error: core.error,
+    isDebug: core.isDebug,
+    startGroup: core.startGroup,
+    endGroup: core.endGroup,
+  };
 }
 
 export function getRunnerLogger(debugMode: boolean): Logger {