add changelogs

Author: austinvalle

.changes/unreleased/FEATURES-20251121-165955.yaml

@@ -0,0 +1,6 @@
+kind: FEATURES
+body: 'all: Added a new plan modifier for all types, `UseNonNullStateForUnknown` that preserves known, non-null, values for unconfigured attributes.
+    This can be used when it is known that an unconfigured value will remain the same after the attribute is updated to a non-null value.'
+time: 2025-11-21T16:59:55.611735-05:00
+custom:
+    Issue: "1242"

.changes/unreleased/NOTES-20251121-170117.yaml

@@ -0,0 +1,9 @@
+kind: NOTES
+body: 'In `[email protected]`, the `UseStateForUnknown` plan modifier was updated to preserve null values from prior state
+    for unconfigured attributes. This updated version can cause plan inconsistency errors when used on child attributes of a nested attribute
+    that expect `UseStateForUnknown` to keep the child attributes on new nested objects as `<unknown>` (known after apply).
+
+    The new `UseNonNullStateForUnknown` plan modifier can now be used where child attributes are expecting this pre-1.15.1 behavior.'
+time: 2025-11-21T17:01:17.961155-05:00
+custom:
+    Issue: "1197"