chore(release): prepare v0.31.0 (#130)

- Update appVersion to 0.31.0
- Update CHANGELOG.md

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: szibis

CHANGELOG.md

@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
+## [0.31.0] - 2026-02-08
+
+### Added
+
+- feat: memory forensics metrics, resource control tuning, and mermaid diagram fixes (#129)
+
+
 ## [0.30.0] - 2026-02-08
 
 ### Added

helm/metrics-governor/Chart.yaml

@@ -3,7 +3,7 @@ name: metrics-governor
 description: OTLP metrics proxy with buffering, statistics tracking, and adaptive limits enforcement
 type: application
 version: 0.9.10
-appVersion: "0.30.0"
+appVersion: "0.31.0"
 keywords:
   - otlp
   - metrics