Scalr/agent-helm agent-job-0.5.68 on GitHub

Selector labels changed: The default app.kubernetes.io/name label changed from agent-job to scalr-agent. Kubernetes does not allow modifying Deployment selectors, so existing installations will fail to upgrade with "field is immutable" error.
Migration options:
- Delete the existing Deployment before upgrading (causes brief downtime, uninstallation will termineta active jobs):
```
kubectl delete deployment <release-name> -n <namespace>
helm upgrade --install <release-name> scalr-agent/agent-job ...
```
- Preserve the old name to maintain compatibility (no downtime):
```
helm upgrade --install <release-name> scalr-agent/agent-job \
--set nameOverride="agent-job" ...
```
CRD replaced: The atasks.scalr.io CRD has been replaced by agenttasktemplates.scalr.io. Existing AgentTask resources will no longer be recognized. The old CRD must be manually removed after upgrading:
```
kubectl delete crd atasks.scalr.io
```

Added task.job.basename option to override the base name prefix for spawned Kubernetes Jobs.
Added "Task Naming" documentation section explaining how Job names are generated.
Added workload-level labels and annotations for the Deployment (agent.labels, agent.annotations) and Job (task.jobLabels, task.jobAnnotations).
Added global labels and annotations applied to all chart resources (global.labels, global.annotations).

Renamed CRD from AgentTask to AgentTaskTemplate for clarity, as the CRD defines a template for tasks, not a task itself.
Default base name changed from chart name (agent-job) to scalr-agent for cleaner resource naming.
Deployment and task template names now use the fullname template instead of hardcoded values.
Updated RBAC to reference agenttasktemplates instead of atasks.
Job naming scheme changed from atask-xxx to <basename>-<run-id>-<stage> (e.g., scalr-agent-run-v0p500fu3s9ban8s8-plan). This provides better control over job naming and uses run IDs familiar to users and operators for better observability.
ClusterRole and ClusterRoleBinding names now include namespace prefix to avoid conflicts in multi-namespace deployments.

Removed atasks.scalr.io CRD (replaced by agenttasktemplates.scalr.io).
Removed unused helper templates: agent-job.componentName, agent-job.dataPVCName, agent-job.cachePVCName.

Fixed podSecurityContext description comments (incorrectly referenced podAnnotations).
Fixed selector labels not being included in Deployment pod template labels.
Fixed pod labels indentation in Deployment template.
Fixed ClusterRoleBinding by removing incorrect namespace field from metadata.