Add 473 release notes

Author: martint

docs/src/main/sphinx/release.md

@@ -6,6 +6,7 @@
 ```{toctree}
 :maxdepth: 1
 
+release/release-473
 release/release-472
 release/release-471
 release/release-470

docs/src/main/sphinx/release/release-473.md

@@ -0,0 +1,56 @@
+# Release 473 (19 Mar 2025)
+
+## General
+
+* Add support for array literals. ({issue}`25301`)
+* Reduce the amount of memory required for `DISTINCT` and `GROUP BY` operations. ({issue}`25127`)
+* Improve performance of `GROUP BY` and `DISTINCT` aggregations when spilling to disk is enabled  
+  or grouping by `row`, `array`, or `map` columns ({issue}`25294`)
+* Fix failure when setting comments on columns with upper case letters. ({issue}`25297`)
+* Fix potential query failure when `retry_policy` set to `TASK` ({issue}`25217`)
+
+## Security
+
+* Add LDAP-based group provider. ({issue}`23900`)
+* Fix column masks not being applied on view columns with upper case. ({issue}`24054`)
+
+## BigQuery connector
+
+* Fix failure when initializing the connector on a machine with more than 32 CPU cores. ({issue}`25228`)
+
+## Delta Lake connector
+
+* Remove the deprecated `glue-v1` metastore type. ({issue}`25201`)
+* Remove deprecated Databricks Unity catalog integration. ({issue}`25250`)
+* Fix Glue endpoint URL override. ({issue}`25324`)
+
+## Hive connector
+
+* Remove the deprecated `glue-v1` metastore type. ({issue}`25201`)
+* Remove deprecated Databricks Unity catalog integration. ({issue}`25250`)
+* Fix Glue endpoint URL override. ({issue}`25324`)
+
+## Hudi connector
+
+* Fix queries getting stuck when reading empty partitions. ({issue}`19506 `)
+* Remove the deprecated `glue-v1` metastore type. ({issue}`25201`)
+* Fix Glue endpoint URL override. ({issue}`25324`)
+
+## Iceberg connector
+
+* Set the `write.<filetype>.compression-codec` table property when creating new tables. ({issue}`24851`)
+* Expose additional properties in `$properties` tables. ({issue}`24812`)
+* Fix Glue endpoint URL override. ({issue}`25324`)
+
+## Kudu connector
+
+* Remove the Kudu connector. ({issue}`24417`)
+
+## Phoenix connector
+
+* Remove the Phoenix connector. ({issue}`24135`)
+
+## SPI
+
+* Add `SourcePage` interface and `ConnectorPageSource.getNextSourcePage()`. ({issue}`24011`)
+* Deprecate `ConnectorPageSource.getNextPage()` for removal. ({issue}`24011`)