fix(transcription): [2f388f42] finalize and fix AI insights feature

This commit resolves all outstanding issues with the AI Insights feature.

- Corrects the transcript formatting logic in  to properly handle the database JSON structure, ensuring the AI receives the correct context.
- Fixes the Gemini API client by using the correct model name ('gemini-2.0-flash') and the proper client initialization.
- Updates  to securely pass the API key as an environment variable to the container.
- Cleans up the codebase by removing temporary debugging endpoints.
- Adds  script for programmatic updates.
- Updates documentation with troubleshooting insights from the implementation process.

.dev_session/SESSION_INFO

@@ -0,0 +1 @@
+{"task_id": "2f388f42-8544-805f-8822-d1765c7d354f", "token": "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"}