feat: Implement generic database connection

CHANGELOG.md

@@ -12,11 +12,18 @@ All notable changes to this project will be documented in this file.
 ### Changed
 
 - BREAKING: `configOverrides` now only accepts the supported config file names `runtime.properties`, `jvm.config` and `security.properties`. Previously arbitrary keys were silently accepted but ignored ([#813]).
-- Bump `stackable-operator` to 0.110.1 and `kube` to 3.1.0 ([#813]).
+- BREAKING: Implement generic database connection for metadata storage ([#814]).
+  The `.clusterConfig.metadataStorageDatabase` has subfields according to the supported db types: `postgresql`, `mysql` and `derby`.
+- BREAKING: The `.clusterConfig.metadataStorageDatabase` field has been renamed to `.clusterConfig.metadataDatabase` for consistency ([#814]).
 - Document Helm deployed RBAC permissions and remove unnecessary permissions ([#810]).
 
+### Deleted
+
+- Removed all metadata storage related properties from product config ([#814]).
+
 [#810]: https://github.com/stackabletech/druid-operator/pull/810
 [#813]: https://github.com/stackabletech/druid-operator/pull/813
+[#814]: https://github.com/stackabletech/druid-operator/pull/814
 [#818]: https://github.com/stackabletech/druid-operator/pull/818
 
 ## [26.3.0] - 2026-03-16