mimir-app release v0.26.0

Added

• Add Crossplane support for Azure (CAPZ) blob storage provisioning with the following resources:
  • Storage Accounts and Blob Containers for mimir, ruler, and alertmanager components
  • ManagementPolicy for automatic blob expiration (configurable per component)
  • PrivateEndpoint for private cluster deployments (when crossplane.private: true)
• Tags from AzureCluster CR are automatically merged with user-provided tags (keys sanitized for Azure compatibility)
• Storage account names are automatically derived and sanitized from container names to meet Azure naming requirements