Add changelog for release PR #779

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: github-actions[bot]

CHANGELOG.md

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+# Changelog
+
+## 2026-05-04 — [#779](https://github.com/cobaltcore-dev/cortex/pull/779)
+
+### cortex v0.0.45 (sha-5d0fc93f)
+
+Non-breaking changes:
+- Add CommittedResource CRD definition and controller that watches CommittedResource objects and manages child Reservation CRUD
+- Add `AllowRejection` field to CommittedResourceSpec for controlling placement failure behavior
+- Add vmware project utilization KPI tracking instances per project/flavor and capacity per host
+- Move vmware resource commitments KPI to new infrastructure plugins package with shared utilities
+- Move vmware host capacity KPI to infrastructure plugins package
+- Add basic support for flavor groups for failover reservation with consolidation weigher
+- Add `useFlavorGroupResources` values.yaml key for cortex-nova (default: false)
+- Update external dependencies (controller-runtime v0.24.0, go-sqlite3 v1.14.44, zap v1.28.0)
+
+### cortex-shim v0.1.0 (sha-d8871ab8)
+
+Breaking changes:
+- Remove `traits.static` values.yaml key and Helm-managed static traits ConfigMap template — traits are now fully managed by the shim at runtime via a single ConfigMap
+
+Non-breaking changes:
+- Add per-request feature mode override via `X-Cortex-Feature-Mode` header
+- Refactor /traits API to single-ConfigMap model with reusable Syncer interface pattern
+- Implement feature-gated /resource_classes API with ConfigMap storage (passthrough, hybrid, crd modes)
+- Add ResourceClassSyncer for periodic upstream sync into local ConfigMap
+- Add `resourceClasses.configMapName` values.yaml key for configuring the resource classes ConfigMap name
+- Support traits and aggregates endpoints per resource provider with three feature modes (passthrough, hybrid, crd)
+- Exercise all three feature modes in placement shim e2e tests
+
+### cortex-nova v0.0.58 (sha-5d0fc93f)
+
+Includes updated chart cortex v0.0.45.
+
+Non-breaking changes:
+- Reorganize KPI CRD templates for infrastructure dashboard metrics
+- Add `useFlavorGroupResources` values.yaml key for failover reservations
+
+### cortex-placement-shim v0.1.0 (sha-d8871ab8)
+
+Includes updated chart cortex-shim v0.1.0.
+
+Breaking changes:
+- Remove `traits.static` values.yaml key (inherited from cortex-shim breaking change)
+
+Non-breaking changes:
+- Add `resourceClasses.configMapName` values.yaml key
+
+### General
+
+Non-breaking changes:
+- Fix bump-artifact workflow to handle concurrent changes on main with concurrency groups and freshness checks
+- Add reusable `bump-chart.sh` script for CI chart version bumps
+- Add pull-request-creator Claude agent
+- Add changelog update command and workflow for release PRs
+- Add linting workflow for scaffold completeness checks
+- Make /release claude command idempotent