STAC-22466: Add release notes 2.3.1 release

Author: dmbarrasuse

SUMMARY.md

@@ -132,6 +132,7 @@
   * [v2.2.0 - 09/Dec/2024](setup/release-notes/v2.2.0.md)
   * [v2.2.1 - 10/Dec/2024](setup/release-notes/v2.2.1.md)
   * [v2.3.0 - 30/Jan/2025](setup/release-notes/v2.3.0.md)
+  * [v2.3.1 - 17/Mar/2025](setup/release-notes/v2.3.1.md)
 * [Upgrade SUSE Observability](setup/upgrade-stackstate/README.md)
   * [Migration from StackState](setup/upgrade-stackstate/migrate-from-6.md)
   * [Steps to upgrade](setup/upgrade-stackstate/steps-to-upgrade.md)

setup/release-notes/v2.3.1.md

@@ -0,0 +1,29 @@
+---
+description: SUSE Observability Self-hosted
+---
+
+# v2.3.1 - 17/March/2025
+
+## Release Notes SUSE Observability Helm Chart version 2.3.1
+
+### New Features & Enhancements
+
+* **Performance:** Significantly improved health timeline performance for large-scale environments.
+* **Webhook Notifications:** Webhook notification channel now accepts any 2xx HTTP status code as a successful response.
+* **Timeline Visibility:** Enhanced visibility for subtle changes within the timeline.
+* **License Expiration Warnings:**
+  * A warning will now appear in the UI 7 days prior to license expiration.
+  * An additional warning will be displayed if the license has been expired for 14 days.
+* **Span Event Inline Display:** Events for Spans are now shown inline, enabling easier trace span analysis.
+* **ArgoCD Helm Chart Compatibility:** The Helm chart can now be installed using ArgoCD by setting `.Values.deployment.compatibleWithArgoCD` to `true`.
+
+### Bug Fixes
+
+* **License Key Secret:** Resolved an issue where the license key secret was not found when `stackstate.authentication.fromExternalSecret` was enabled.
+* **Widget Collapse/Expand Animation:** Corrected the collapse/expand animation for widgets.
+* **Trace Latency Selection:** Corrected a bug that affected the selection of trace latency.
+
+## Agent Bug Fixes
+
+* **API Key Requirement:** Fixed a bug that incorrectly required `stackstate.apiKey` when `stackstate.manageOwnSecrets=true` was set.
+* **Header Injector:** Fixed an issue with the header injector when handling long release names.