Copy release notes from release-19.0 into main

Signed-off-by: Andres Taylor <andres@planetscale.com>

changelog/19.0/19.0.4/changelog.md

@@ -0,0 +1,41 @@
+# Changelog of Vitess v19.0.4
+
+### Bug fixes 
+#### Evalengine
+ * [release-19.0] projection: Return correct collation information (#15801) [#15804](https://github.com/vitessio/vitess/pull/15804) 
+#### General
+ * [release-19.0] GRPC: Address potential segfault in dedicated connection pooling (#15751) [#15753](https://github.com/vitessio/vitess/pull/15753)
+ * [release-19.0] Properly unescape keyspace name in FindAllShardsInKeyspace (#15765) [#15786](https://github.com/vitessio/vitess/pull/15786) 
+#### Query Serving
+ * [release-19.0] Fix TPCH test by providing the correct field information in evalengine (#15623) [#15655](https://github.com/vitessio/vitess/pull/15655)
+ * [release-19.0] fix: don't forget DISTINCT for derived tables (#15672) [#15678](https://github.com/vitessio/vitess/pull/15678)
+ * [release-19.0] Fix panic in aggregation (#15728) [#15736](https://github.com/vitessio/vitess/pull/15736)
+ * [release-19.0] Fix wrong assignment to `sql_id_opt` in the parser (#15862) [#15869](https://github.com/vitessio/vitess/pull/15869) 
+#### Topology
+ * [release-19.0] discovery: Fix tablets removed from healthcheck when topo server GetTablet call fails (#15633) [#15681](https://github.com/vitessio/vitess/pull/15681)
+ * [release-19.0] Fix ZooKeeper Topology connection locks not being cleaned up correctly (#15757) [#15764](https://github.com/vitessio/vitess/pull/15764) 
+#### VReplication
+ * [release-19.0] VReplication: Take replication lag into account in VStreamManager healthcheck result processing (#15761) [#15774](https://github.com/vitessio/vitess/pull/15774) 
+#### VTAdmin
+ * [release-19.0] [VTAdmin API] Fix schema cache flag, add documentation (#15704) [#15720](https://github.com/vitessio/vitess/pull/15720) 
+#### VTorc
+ * [release-19.0]: VTOrc optimize TMC usage (#15356) [#15759](https://github.com/vitessio/vitess/pull/15759)
+### CI/Build 
+#### General
+ * [release-19.0] Upgrade the Golang version to `go1.22.3` [#15864](https://github.com/vitessio/vitess/pull/15864) 
+#### VReplication
+ * [release-19.0] VReplication: Get workflowFlavorVtctl endtoend testing working properly again (#15636) [#15667](https://github.com/vitessio/vitess/pull/15667)
+### Internal Cleanup 
+#### General
+ * [release-19.0] changelogs: squash 19.0.2/19.0.3 into just 19.0.3 and remove 19.0.2 (#15665) [#15668](https://github.com/vitessio/vitess/pull/15668)
+### Performance 
+#### VTTablet
+ * [release-19.0] Improve performance for `BaseShowTablesWithSizes` query. (#15713) [#15795](https://github.com/vitessio/vitess/pull/15795)
+### Regression 
+#### Query Serving
+ * [release-19.0] Fix regression where inserts into reference tables with a different name on sharded keyspaces were not routed correctly. (#15796) [#15860](https://github.com/vitessio/vitess/pull/15860)
+### Release 
+#### General
+ * [release-19.0] Bump to `v19.0.4-SNAPSHOT` after the `v19.0.3` release [#15662](https://github.com/vitessio/vitess/pull/15662)
+ * [release-19.0] Code Freeze for `v19.0.4` [#15874](https://github.com/vitessio/vitess/pull/15874)
+

changelog/19.0/19.0.4/release_notes.md

@@ -0,0 +1,7 @@
+# Release of Vitess v19.0.4
+The entire changelog for this release can be found [here](https://github.com/vitessio/vitess/blob/main/changelog/19.0/19.0.4/changelog.md).
+
+The release includes 19 merged Pull Requests.
+
+Thanks to all our contributors: @GuptaManan100, @app/vitess-bot, @systay, @vitess-bot
+

changelog/19.0/README.md

@@ -1,4 +1,8 @@
 ## v19.0
+* **[19.0.4](19.0.4)**
+ * [Changelog](19.0.4/changelog.md)
+ * [Release Notes](19.0.4/release_notes.md)
+
 * **[19.0.3](19.0.3)**
  * [Changelog](19.0.3/changelog.md)
  * [Release Notes](19.0.3/release_notes.md)