Tighten sandbox changelog wording

Author: YunchuWang

CHANGELOG.md

@@ -9,8 +9,12 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ADDED
 
-- Added activity execution lifecycle hooks used by Azure Managed sandbox
-  workers to report active activity counts while work is running.
+- Added overridable activity-dispatch hooks `_on_activity_execution_started`
+  and `_on_activity_execution_completed` on `TaskHubGrpcWorker`, invoked
+  immediately before each activity runs and in a `finally` after it completes
+  or fails. Subclasses can override these to observe in-flight activity
+  execution (for example, to track the number of activities currently
+  running).
 - Added `durabletask.extensions.history_export` for exporting the event history of
   terminal orchestrations to an external destination. Includes
   `ExportHistoryClient`, a per-job `ExportHistoryJobClient` returned by

durabletask-azuremanaged/CHANGELOG.md

@@ -8,14 +8,12 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 ## Unreleased
 
 - Updates base dependency to durabletask v1.6.0.
-- Added preview `durabletask.azuremanaged.preview.sandboxes` APIs for
-  declaring Durable Task Scheduler sandbox activities, registering
-  worker profiles, and running sandbox activity workers.
-- Added optional activity versions to sandbox worker profile declarations and
-  sandbox worker registration.
-- Required sandbox workers to fail fast when `DTS_SANDBOX_ID` is missing,
-  treated `DTS_SANDBOX_PROVIDER` as optional metadata, and added context
-  manager support to `SandboxActivitiesClient`.
+- Added preview support for Durable Task Scheduler on-demand sandbox
+  activities under `durabletask.azuremanaged.preview.sandboxes`. Applications
+  can declare sandbox activities (with optional per-activity versions),
+  register sandbox worker profiles, and run a sandbox activity worker that
+  establishes a live worker session and dispatches only the activities it
+  has registered.
 
 ## v1.5.0