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docs: add changelog for v1.0.0-rc.1

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Signed-off-by: cozystack-bot <217169706+cozystack-bot@users.noreply.github.com>
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> **⚠️ Release Candidate Warning**: This is a release candidate intended for final validation before the stable v1.0.0 release. Breaking changes are not expected at this stage, but please test thoroughly before deploying to production.
## Features and Improvements
* **[harbor] Add managed Harbor container registry**: Added Harbor v2.14.2 as a managed tenant-level container registry service. The application uses CloudNativePG for PostgreSQL, the Redis operator for caching, and S3 via COSI BucketClaim (from SeaweedFS) for registry image storage. Auto-generated admin credentials are persisted across upgrades, TLS is handled by cert-manager, and Trivy vulnerability scanner is included. Users can now deploy a fully managed, production-ready OCI container registry within their tenant ([**@lexfrei**](https://github.com/lexfrei) in #2058).
* **[kubernetes] Update supported Kubernetes versions to v1.30–v1.35**: Updated the tenant Kubernetes version matrix to v1.30, v1.31, v1.32, v1.33, v1.34, and v1.35 (now the default). EOL versions v1.28 and v1.29 are removed. Kamaji is updated to edge-26.2.4 with full Kubernetes 1.35 support, and the CAPI Kamaji provider is updated to v0.16.0. A compatibility patch ensures kubelets older than v1.35 are not broken by Kamaji injecting 1.35-specific kubelet fields ([**@lexfrei**](https://github.com/lexfrei) in #2073).
* **[platform] Make cluster issuer name and ACME solver configurable**: Added `publishing.certificates.solver` (`http01` or `dns01`) and `publishing.certificates.issuerName` (default: `letsencrypt-prod`) parameters to the platform chart. This allows operators to point all ingress TLS annotations at any ClusterIssuer — custom ACME, self-signed, or internal CA — without modifying individual package templates. See the Breaking Changes section for the rename from the previous `issuerType` field ([**@myasnikovdaniil**](https://github.com/myasnikovdaniil) in #2077).
* **[dashboard] VMInstance dropdowns for disks and instanceType**: The VM instance creation form now renders API-backed dropdowns for the `instanceType` field (populated from `VirtualMachineClusterInstancetype` cluster resources) and for disk `name` fields (populated from `VMDisk` resources in the same namespace). Default values are read from the ApplicationDefinition's OpenAPI schema. This eliminates manual lookups and reduces misconfiguration when attaching disks or selecting VM instance types ([**@sircthulhu**](https://github.com/sircthulhu) in #2071).
* **[installer] Remove CRDs from Helm chart, delegate lifecycle to operator**: The `cozy-installer` Helm chart no longer ships CRDs in its `crds/` directory. CRD lifecycle is now fully managed by the Cozystack operator via the `--install-crds` flag, which applies embedded CRD manifests on every startup using server-side apply. The platform PackageSource is also created by the operator instead of a Helm template. This ensures CRDs and the PackageSource are always up to date after each operator restart, eliminating stale CRDs from Helm's install-only behavior ([**@lexfrei**](https://github.com/lexfrei) in #2074).
## Fixes
* **[kubevirt] Update KubeVirt to v1.6.4 and CDI to v1.64.0, fix VM pod initialization**: Updated KubeVirt operator to v1.6.4 and CDI operator to v1.64.0, including live migration of existing VMs during the upgrade. Additionally, disabled serial console logging globally via the KubeVirt CR to prevent a known v1.6.x issue ([upstream #15989](https://github.com/kubevirt/kubevirt/issues/15989)) where the `guest-console-log` init container blocked virt-launcher pods from starting, causing all VMs to get stuck in `PodInitializing` state ([**@nbykov0**](https://github.com/nbykov0) in #1833; [**@kvaps**](https://github.com/kvaps) in 7dfb819).
* **[linstor] Fix DRBD+LUKS+STORAGE resource creation failure**: All newly created encrypted volumes were failing because the DRBD `.res` file was never written due to a missing `setExists(true)` call in the `LuksLayer`. Applied the upstream `skip-adjust-when-device-inaccessible` patch ([LINBIT/linstor-server#477](https://github.com/LINBIT/linstor-server/pull/477)) which fixes the root cause and also prevents unnecessary lsblk calls when devices are not yet physically present ([**@kvaps**](https://github.com/kvaps) in #2072).
* **[system] Fix monitoring-agents FQDN resolution for tenant workload clusters**: Monitoring agents (`vmagent`, `fluent-bit`) in tenant workload clusters were failing to deliver metrics and logs because service addresses used short DNS names without the cluster domain suffix. Fixed by appending the configured cluster domain from `_cluster.cluster-domain` (with fallback to `cluster.local`) to all vmagent remoteWrite URLs and fluent-bit output hosts ([**@IvanHunters**](https://github.com/IvanHunters) in #2075).
* **[cozystack-basics] Preserve existing HelmRelease values during reconciliations**: Fixed a data-loss bug where changes made to the `tenant-root` HelmRelease were silently dropped on the next forced or upgrade reconciliation of the `cozystack-basics` HelmRelease. The reconciler now merges new configuration with existing values instead of overwriting them ([**@sircthulhu**](https://github.com/sircthulhu) in #2068).
* **[cozystack-basics] Deny resourcequotas deletion for tenant admin**: Fixed the `cozy:tenant:admin:base` ClusterRole to explicitly deny deletion of `ResourceQuota` objects for tenant admins and superadmins, preventing accidental removal of tenant resource limits ([**@myasnikovdaniil**](https://github.com/myasnikovdaniil) in #2076).
## Breaking Changes & Upgrade Notes
* **[platform] Certificate issuer configuration parameters renamed**: The `publishing.certificates.issuerType` field is renamed to `publishing.certificates.solver`, and the value `cloudflare` is renamed to `dns01` to align with standard ACME terminology. A new `publishing.certificates.issuerName` field (default: `letsencrypt-prod`) is introduced to allow pointing all ingresses at a custom ClusterIssuer. Migration 32 is included and automatically converts existing configurations during upgrade — no manual action is required ([**@myasnikovdaniil**](https://github.com/myasnikovdaniil) in #2077).
## Documentation
* **[website] Migrate ConfigMap references to Platform Package in v1 documentation**: Updated the entire v1 documentation tree to replace legacy ConfigMap-based configuration references with the new Platform Package API, ensuring guides are consistent with the v1 configuration model ([**@sircthulhu**](https://github.com/sircthulhu) in cozystack/website#426).
* **[website] Add generic Kubernetes deployment guide for v1**: Added a new installation guide covering Cozystack deployment on any generic Kubernetes cluster, expanding the set of supported deployment targets beyond provider-specific guides ([**@lexfrei**](https://github.com/lexfrei) in cozystack/website#408).
* **[website] Refactor resource planning documentation**: Improved the resource planning guide with a clearer structure and more comprehensive coverage of planning considerations for Cozystack deployments ([**@IvanStukov**](https://github.com/IvanStukov) in cozystack/website#423).
* **[website] Add ServiceAccount API access documentation and update FAQ**: Added a new article documenting ServiceAccount API access token configuration and updated the FAQ to include related troubleshooting guidance ([**@IvanStukov**](https://github.com/IvanStukov) in cozystack/website#421).
* **[website] Update networking-mesh allowed-location-ips example**: Replaced provider-specific CLI usage with standard `kubectl` commands in the multi-location networking guide's `allowed-location-ips` example, making the documentation more universally applicable ([**@kvaps**](https://github.com/kvaps) in cozystack/website#425).
## Contributors
We'd like to thank all contributors who made this release possible:
* [**@IvanHunters**](https://github.com/IvanHunters)
* [**@IvanStukov**](https://github.com/IvanStukov)
* [**@kvaps**](https://github.com/kvaps)
* [**@lexfrei**](https://github.com/lexfrei)
* [**@myasnikovdaniil**](https://github.com/myasnikovdaniil)
* [**@nbykov0**](https://github.com/nbykov0)
* [**@sircthulhu**](https://github.com/sircthulhu)
### New Contributors
We're excited to welcome our first-time contributors:
* [**@myasnikovdaniil**](https://github.com/myasnikovdaniil) - First contribution!
**Full Changelog**: https://github.com/cozystack/cozystack/compare/v1.0.0-beta.6...v1.0.0-rc.1