Andrei Kvapil a939b2bbd0 [registry] Add application labels and update filtering mechanism (#1707)
This change is extracted from
- https://github.com/cozystack/cozystack/pull/1641

and reworked to work standalone

## What this PR does

This PR extracts changes from the
https://github.com/cozystack/cozystack/pull/1641. It adds application
metadata labels to HelmReleases and updates the filtering mechanism to
use labels instead of chart/sourceRef matching.

Changes:
- Add three application metadata labels
(`apps.cozystack.io/application.kind`,
`apps.cozystack.io/application.group`,
`apps.cozystack.io/application.name`) when creating/updating HelmRelease
via Cozystack-API
- Replace `shouldIncludeHelmRelease` filtering with label-based
filtering in Get, List, and Update methods
- Always add kind and group label requirements in List for precise
filtering
- Update CozystackResourceDefinitionController to watch only
HelmReleases with `cozystack.io/ui=true` label
- Update LineageControllerWebhook to extract metadata directly from
HelmRelease labels instead of using chart mapping configuration
- Add functionality to update HelmRelease chart from
CozystackResourceDefinition using label selectors

### Release note

```release-note
[registry] Add application labels and update filtering mechanism to use label-based filtering instead of chart/sourceRef matching
```

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Added application metadata labels (kind, group, name) and exported
label keys for HelmRelease identification.
* New reconciler keeps HelmRelease charts in sync with application CRDs.

* **Refactor**
* Mapping, listing and selection moved to label-driven logic;
reconciliation responsibilities split so core reconciler focuses on
restart/debounce while a separate reconciler updates HelmReleases.

* **Chores**
* Migration script to backfill application labels on existing
HelmReleases.

<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Cozystack Cozystack

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Cozystack

Cozystack is a free PaaS platform and framework for building clouds.

Cozystack is a CNCF Sandbox Level Project that was originally built and sponsored by Ænix.

With Cozystack, you can transform a bunch of servers into an intelligent system with a simple REST API for spawning Kubernetes clusters, Database-as-a-Service, virtual machines, load balancers, HTTP caching services, and other services with ease.

Use Cozystack to build your own cloud or provide a cost-effective development environment.

Cozystack user interface

Use-Cases

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The documentation is located on the cozystack.io website.

Read the Getting Started section for a quick start.

If you encounter any difficulties, start with the troubleshooting guide and work your way through the process that we've outlined.

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Versioning adheres to the Semantic Versioning principles.
A full list of the available releases is available in the GitHub repository's Release section.

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Contributions are highly appreciated and very welcomed!

In case of bugs, please check if the issue has already been opened by checking the GitHub Issues section. If it isn't, you can open a new one. A detailed report will help us replicate it, assess it, and work on a fix.

You can express your intention to on the fix on your own. Commits are used to generate the changelog, and their author will be referenced in it.

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Cozystack is licensed under Apache 2.0.
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