docs: add CHANGELOG entry for Sentry profiling

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: brendan-kellam

CHANGELOG.md

@@ -25,6 +25,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - [EE] Added image attachments to Ask Sourcebot, letting users attach images to a chat message when the selected model supports image input. [#1375](https://github.com/sourcebot-dev/sourcebot/pull/1375)
 - Added deployment system resource stats (CPU cores + cgroup quota, host + container memory, disk, load average) to the service ping, so resource issues can be diagnosed more quickly. [#1424](https://github.com/sourcebot-dev/sourcebot/pull/1424)
 - Added a `robots.txt` that disallows crawlers, with an allowlist for link-preview bots so shared links keep their OpenGraph previews. [#1426](https://github.com/sourcebot-dev/sourcebot/pull/1426)
+- Added Sentry node and browser profiling to the web app. [#1431](https://github.com/sourcebot-dev/sourcebot/pull/1431)
 
 ### Fixed
 - Send anonymous server-side PostHog events as personless so unauthenticated requests don't inflate person counts. [#1367](https://github.com/sourcebot-dev/sourcebot/pull/1367)