Add changelog entry for #5791

Author: runningcode

CHANGELOG.md

@@ -4,6 +4,8 @@
 
 ### Fixes
 
+- Batch and coalesce scope-persistence disk writes to reduce startup cost ([#5791](https://github.com/getsentry/sentry-java/pull/5791))
+  - Scope mutations are now coalesced (latest value per field) and breadcrumbs are appended in batches behind a single fsync, instead of one synchronous disk write per mutation. Persisted scope data (used to enrich crash/ANR events on the next launch) may now lag real-time changes by up to ~100 ms.
 - Backfill release, environment, distribution, tags, and app version/build—and use the matching replay-on-error sample rate—for `ApplicationExitInfo` ANR and native crash events captured before SDK initialization, without reusing options cached by a later app update ([#5762](https://github.com/getsentry/sentry-java/pull/5762))
 - `SentryTagModifierNode.isImportantForBounds` now matches the default behavior and returns `true` ([#5789](https://github.com/getsentry/sentry-java/pull/5789))
 - Prevent a `StackOverflowError` when a `beforeSend`, `beforeBreadcrumb`, `beforeSendLog`, or `beforeEnvelope` callback triggers another capture (directly or through a logging integration such as Timber) ([#5737](https://github.com/getsentry/sentry-java/pull/5737))