chore(server): improve transcript stability (#13821)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Enhanced audio/video detection for MP4 files to better distinguish
audio-only vs. video.

* **Dependencies**
* Added MP4 parsing dependency and updated AI provider libraries
(Anthropic, Google, OpenAI, etc.).

* **Bug Fixes**
  * Tightened authentication state validation for magic-link/OTP flows.
* Stricter space-join validation to reject invalid client
types/versions.
  * Improved transcript entry deduplication and data handling.

* **API**
* Transcript submit payload now requires infos and removes deprecated
url/mimeType fields.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/plugins/copilot/providers/gemini/generative.ts

@@ -112,9 +112,7 @@ export class GeminiGenerativeProvider extends GeminiProvider<GeminiGenerativeCon
           `${baseUrl}/models?key=${this.config.apiKey}`
         )
           .then(r => r.json())
-          .then(
-            r => (console.log(JSON.stringify(r)), ModelListSchema.parse(r))
-          );
+          .then(r => ModelListSchema.parse(r));
         this.onlineModelList = models.map(model =>
           model.name.replace('models/', '')
         );