[_]: feat/batch-delete-shards-per-farmer

[sg-gs]

What

deleteShardsStorageByUuids now groups shards by farmer node and enqueues a single delete-shards-batch job per node (in chunks of 50) instead of one delete-shard job per shard.

How

• Shards are grouped by address:port using a Map before enqueuing
• Each group is split into chunks of 50 and enqueued as delete-shards-batch jobs, which the worker handles via DELETE /v2/shards with a { keys[] } body
• Existing delete-shard job type is untouched — only v2 UUID-based deletions are batched

⚠️ NEEDS https://github.com/internxt/network-worker/pull/32