5c3b85334b
When users share Instagram posts or stories via DM, Instagram sends webhooks with type `ig_post` and `ig_story` attachments. The system was failing on these types because they weren't defined in the file_types. This PR fixes the issue by handling all shared types and rendering them on the front end. **Shared post** <img width="2154" height="1828" alt="CleanShot 2025-12-03 at 16 29 14@2x" src="https://github.com/user-attachments/assets/7e731171-4904-43a6-abeb-b1db2c262742" /> **Shared status** <img width="1702" height="1676" alt="CleanShot 2025-12-03 at 16 10 25@2x" src="https://github.com/user-attachments/assets/6a151233-ce47-429d-b7c2-061514b20e05" /> Fixes https://linear.app/chatwoot/issue/CW-5441/argumenterror-ig-story-is-not-a-valid-file-type-argumenterror