chore: Update OpenAPI specs

fern/apis/beta/changelog/2025-01-28.md

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+
+## New Endpoints
+
+### Atoms
+- Added [`GET /atoms.get`](/beta/api-reference/atoms/get) and [`POST /atoms.get`](/beta/api-reference/atoms/get-post) endpoints as a way to retrieve generic object information
+
+### Stage Diagrams
+- Added new endpoints for managing stage diagrams:
+  - [`POST /stage-diagrams.create`](/beta/api-reference/customization/stage-diagrams-create)
+  - [`GET /stage-diagrams.get`](/beta/api-reference/customization/stage-diagrams-get) and [`POST /stage-diagrams.get`](/beta/api-reference/customization/stage-diagrams-get-post)
+  - [`GET /stage-diagrams.list`](/beta/api-reference/customization/stage-diagrams-list) and [`POST /stage-diagrams.list`](/beta/api-reference/customization/stage-diagrams-list-post)
+  - [`POST /stage-diagrams.update`](/beta/api-reference/customization/stage-diagrams-update)
+
+## Modified Endpoints
+
+### Conversations
+- Added support for date filtering in conversations endpoints:
+  - [`GET /conversations.list`](/beta/api-reference/conversations/list)
+  - [`POST /conversations.list`](/beta/api-reference/conversations/list-post)
+  - [`GET /conversations.export`](/beta/api-reference/conversations/export)
+  - [`POST /conversations.export`](/beta/api-reference/conversations/export-post)
+
+- Added new properties to conversation objects:
+  - `custom_fields`
+  - `custom_schema_fragments`
+  - `stock_schema_fragment`
+  - `subtype`
+
+### Incidents
+- Added `custom_fields` support to incidents endpoints:
+  - [`GET /incidents.group`](/beta/api-reference/operate/incidents-group)
+  - [`POST /incidents.group`](/beta/api-reference/operate/incidents-group-post)
+  - [`GET /incidents.list`](/beta/api-reference/operate/incidents-list)
+  - [`POST /incidents.list`](/beta/api-reference/operate/incidents-list-post)
+
+### Snap-ins
+- Added `is_expired` property to keyring objects in [`GET /snap-ins.resources`](/beta/api-reference/snap-ins/resources) and [`POST /snap-ins.resources`](/beta/api-reference/snap-ins/resources-post) responses
+
+### Schema Changes
+The following schema changes affect multiple endpoints:
+
+- Added `translated_values` property to enum field descriptors
+- Added `translated_values` property to enum list field descriptors
+- These changes affect endpoints that work with schemas, including:
+  - Content template endpoints
+  - Schema management endpoints
+  - Survey endpoints
+  - Timeline entry endpoints
+  - Webhook event endpoints
+
+### Webhook Events
+- Added `old_conversation` property to conversation delete/update events
+- Added `old_sla_tracker` property to SLA tracker update events