v1.22.0 release notes

docs/user/reference/release-history.rst

@@ -2,6 +2,17 @@
 Release History
 ***************
 
+v1.22.0 (2024-10-02)
+====================
+
+Changed
+-------
+* Added a `NX_class` field as a `PerObjectHint` to the `EventDescriptor` document.
+* Removed `Optional` on `DataKey` fields `precision`, ``choices``, and `units`. These fields can still be left out of the `DataKey`, but if provided they cannot be `None`.
+* Added a `Limits` type for storing EPICS limit data and a `NotRequired[Limits]` `limits` field to `DataKey`.
+* Added a `NotRequired` `dtype_numpy` field to `DataKey` for specifying the numpy dtype of data.
+* Bumped from `jsonschema 3.*` to `jsonschema 4.*`.
+
 v1.21.0 (2024-05-21)
 ====================