Add eventId for task tracking in modals

[stephdl]

Enhance task registration and completion tracking by adding eventId to the InstallAppModal, RestoreSingleInstanceModal, and CloneOrMoveAppModal components. This change improves the ability to trace tasks throughout their lifecycle.

NethServer/dev#7757

[Copilot]

Pull request overview

This PR updates task handling in several modals to use per-task eventIds so that progress, completion, and error events can be uniquely correlated with the task instance that triggered them, improving traceability across the task lifecycle.

Changes:

• Updated InstallAppModal task flows (get-cluster-status, list-nodes, list-mountpoints, add-module) to generate a UUID eventId, subscribe to ${action}-*-<eventId> events, and pass eventId through extra when creating tasks.
• Updated CloneOrMoveAppModal for the same pattern on list-nodes, get-cluster-status, list-mountpoints, and clone-module, and slightly refactored mount-points completion handling for cleaner state updates.
• Updated RestoreSingleInstanceModal to use eventId for list-modules, list-nodes, list-mountpoints, restore-module, determine-restore-eligibility, and get-cluster-status, aligning these flows with the notification mixin’s eventId-aware event naming.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
core/ui/src/components/software-center/InstallAppModal.vue	Switches cluster and node task handling to eventId-scoped event names and passes eventId in task extra, plus a small refactor of mount-point result assignment.
core/ui/src/components/software-center/CloneOrMoveAppModal.vue	Applies eventId-based event names and propagation for list/get/mountpoint tasks and the clone/move operation, with a minor cleanup of how additional volumes are built.
core/ui/src/components/backup/RestoreSingleInstanceModal.vue	Adopts eventId handling for module listing, node listing, mount-point listing, restore, eligibility checks, and cluster status, ensuring consistency with the notification mixin’s event naming and usage.

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