NUL-1132 AddSentryTag()

[nalbion]

Description

Allow arbitrary tags to be added dynamically by the app.

Linked Issues & PRs

• towards https://linear.app/nullify-ai/issue/NUL-1132/add-glitchtip-tags-for-repositories

Checklist

• [x] I have added one of the patch, minor, major or no-release labels
• [ ] I have linked an issue from this repository using the Development option
• [ ] I have performed a self-review of my own code
• [ ] I have checked for redundant or commented out code
• [ ] I have commented my code where I can't make it self-documenting
• [ ] I have made corresponding changes to the documentation
• [ ] I have added any appropriate tests