feat: Add API to activate/deactivate clusters (#95)

* feat: Add API to activate/deactivate clusters

* changelog

* Add some docs

* linters

* Update trino-lb-core/src/config.rs

Co-authored-by: Techassi <git@techassi.dev>

* Update docs/design.md

Co-authored-by: Techassi <git@techassi.dev>

* Only derive Serialize

* Use Copy instead of Clone

* Only derive Serialize

* Update trino-lb-core/src/trino_cluster.rs

Co-authored-by: Techassi <git@techassi.dev>

* Fix compilation

* clippy

* Add API to get single cluster status

* Improve snafu error messages

* Update trino-lb/src/http_server/admin/mod.rs

* Update trino-lb/src/http_server/admin/mod.rs

Co-authored-by: Techassi <git@techassi.dev>

* Update trino-lb/src/http_server/admin/mod.rs

Co-authored-by: Techassi <git@techassi.dev>

* Update trino-lb/src/http_server/admin/mod.rs

---------

Co-authored-by: Techassi <git@techassi.dev>

Author: sbernauer

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+### Added
+
+- Support activating and deactivation Trino clusters via API calls to `/admin/clusters/{cluster_name}/activate` and `/admin/clusters/{cluster_name}/deactivate` respectively. For this to work you need to authenticate yourself at trino-lb via basic auth ([#95]).
+- Expose cluster statistics at `/admin/clusters/{cluster_name}/status` and `/admin/clusters/status` ([#95]).
+
 ### Changed
 
 - The Stackable scaler now ensures that a `TrinoCluster` has changed to `ready` more than 5 seconds
@@ -22,6 +27,7 @@ All notable changes to this project will be documented in this file.
 [#85]: https://github.com/stackabletech/trino-lb/pull/85
 [#86]: https://github.com/stackabletech/trino-lb/pull/86
 [#91]: https://github.com/stackabletech/trino-lb/pull/91
+[#95]: https://github.com/stackabletech/trino-lb/pull/95
 
 ## [0.5.0] - 2025-03-14