feat(core): Fully migrate packages/core to AgentLoopContext. (#22115)

packages/core/src/services/chatCompressionService.test.ts

@@ -172,6 +172,9 @@ describe('ChatCompressionService', () => {
       } as unknown as GenerateContentResponse);
 
     mockConfig = {
+      get config() {
+        return this;
+      },
       getCompressionThreshold: vi.fn(),
       getBaseLlmClient: vi.fn().mockReturnValue({
         generateContent: mockGenerateContent,