Align store manifest with published GHCR image tag

[Copilot]

The repository and published images job was failing because the add-on store manifest advertised 1.2.9, but the corresponding GHCR images for aarch64 and amd64 were not published. This change realigns the repository metadata with the latest available published tag so installs and validation reference an existing image.

• Manifest

  • Revert ekey_ha_daemon/config.yaml version from 1.2.9 to 1.2.8.
  • This makes the store point at image tags that currently exist in GHCR for all declared architectures.

• Release notes

  • Rename the 1.2.9 changelog section to Unreleased.
  • This avoids presenting unpublished store metadata as a released version.

• Effect on validation

  • The repository validator now resolves the declared image/tag pair instead of failing on missing manifests.

# ekey_ha_daemon/config.yaml
-version: "1.2.9"
+version: "1.2.8"
image: "ghcr.io/agrisvi/{arch}-addon-ekey_ha_daemon"