[Feature] Delete entire group

[hanahmily]

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• I had searched in the issues and found no similar feature requirement.

Description

• Objective: Implement end-to-end deletion for a whole group, including removing all physical data and purging metadata from the metadata repository.
• Scope
  • Remove all physical data structures of the group:
    • Streams/measures data files, indexes, snapshots.
  • Remove the group metadata and all child metadata (streams/measures) from the metadata repo atomically.
  • Cluster-wide orchestration: block new writes for the group, drain/flush, then delete.
• Requirements
  • Idempotent API/CLI: DELETE /groups/{group} (server-side implements best-effort idempotency).
  • Safety: optional dry-run, force=true for non-empty groups, preflight checks (no active schema changes).
  • Ordering:
    1. Quiesce group (reject new writes, wait for in-flight ops).
    2. Close the group tsdb.
    3. Remove physical data by the path prefix of the group.
    4. Purge metadata (group and descendants) from repo.
    5. Broadcast/evict routing, and discovery entries.
  • Observability: Using metadata to track the progress of the deletion.
• Acceptance Criteria
  • Deleting a group removes all on-disk data and metadata and prevents new writes/reads.
  • Operation is idempotent and safe under retries and leader failover.
  • Works across rolling clusters; no orphaned files remain.
  • Docs include an admin guide and recovery caveats.

Use case

No response

Related issues

No response

Are you willing to submit a pull request to implement this on your own?

• Yes I am willing to submit a pull request on my own!

Code of Conduct

• I agree to follow this project's Code of Conduct