feat(channels): add google chat adapter and webhook route

src/config/schema.test.ts

@@ -375,6 +375,30 @@ describe('configSchema — teams', () => {
   });
 });
 
+describe('configSchema — google_chat', () => {
+  const minimalConfig = {
+    telegram: { bot_token: 'test', allowed_chat_ids: [1] },
+    models: { default: { provider: 'anthropic', model: 'claude-3' } },
+  };
+
+  it('accepts google_chat config and defaults filters', () => {
+    const result = configSchema.parse({
+      ...minimalConfig,
+      google_chat: {
+        service_account_key_file: '/tmp/gchat-service-account.json',
+      },
+    });
+
+    expect(result.google_chat).toBeDefined();
+    if (!result.google_chat) {
+      throw new Error('Expected google_chat config');
+    }
+    expect(result.google_chat.service_account_key_file).toBe('/tmp/gchat-service-account.json');
+    expect(result.google_chat.allowed_space_names).toEqual([]);
+    expect(result.google_chat.require_mention).toBe(true);
+  });
+});
+
 describe('configSchema — whatsapp', () => {
   const minimalConfig = {
     telegram: { bot_token: 'test', allowed_chat_ids: [1] },