+ update changelogs + date

Author: bdbyrne

fern/apis/beta/changelog/2025-04-17.md

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+
+## New Endpoints
+
+### Service Accounts
+- Added [`POST /service-accounts.create`](/beta/api-reference/service-accounts/create) for creating service accounts
+
+### Widgets
+- Added [`GET /widgets.get`](/beta/api-reference/widgets/get) for retrieving widgets
+
+## Modified Features
+
+### Customization
+- Added `is_overridable` property to schema enum fields
+
+### Timeline
+- Added `references` property to timeline comments
+
+### Parts
+- Added support for part types `linkable` and `runnable`

fern/apis/beta/changelog/2025-04-24.md

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+
+## New Endpoints
+
+### Service Accounts
+- Added [`POST /service-accounts.create`](/public/api-reference/service-accounts/create) for creating service accounts
+
+## Modified Endpoints
+
+### Customization
+- Added `is_overridable` property to schema enum fields
+
+### Timeline
+- Added `references` property to timeline comments