Add 474 release notes

Author: pettyjamesm

docs/src/main/sphinx/release.md

@@ -6,6 +6,7 @@
 ```{toctree}
 :maxdepth: 1
 
+release/release-474
 release/release-473
 release/release-472
 release/release-471

docs/src/main/sphinx/release/release-474.md

@@ -0,0 +1,16 @@
+# Release 474 (21 Mar 2025)
+
+## General
+* Add `originalUser` and `authenticatedUser` as resource group selectors. ({issue}`24662`)
+* Fix a correctness bug in `GROUP BY` or `DISTINCT` queries with a large number of unique groups ({issue}`25381`)
+
+## Docker image
+* Use JDK 24 in the runtime ({issue}`23501`)
+
+## Delta Lake connector
+* Fix failure for `MERGE` queries on [cloned](https://delta.io/blog/delta-lake-clone/) tables. ({issue}`24756`)
+
+## Iceberg connector
+* Add support for setting session timeout on iceberg REST catalog instances. This is configured via the iceberg catalog config property `iceberg.rest-catalog.session-timeout` (default: 1h) ({issue}`25160`)
+* Add support for configuring whether OAuth token refreshes are enabled for iceberg REST catalogs. This is configured via the iceberg catalog config property `iceberg.rest-catalog.oauth2.token-refresh-enabled` (default: true) ({issue}`25160`)
+