add changelog entries for #1508 and #1513 (#1520)

Author: stephybun

.changes/unreleased/ENHANCEMENTS-20250915-092938.yaml

@@ -0,0 +1,5 @@
+kind: ENHANCEMENTS
+body: 'helper/schema: Added an additional validation check to ensure the resource identity object is not null.'
+time: 2025-09-15T09:29:38.603088+02:00
+custom:
+    Issue: "1513"

.changes/unreleased/ENHANCEMENTS-20250915-093208.yaml

@@ -0,0 +1,5 @@
+kind: ENHANCEMENTS
+body: 'helper/schema: Added the `TfTypeIdentityState()` and `TfTypeResourceState()` methods to `ResourceData` which return the identity and state values as a `tftypes.Value`.'
+time: 2025-09-15T09:32:08.842763+02:00
+custom:
+    Issue: "1508"