/v4/data/storage/upload/{jobId}

Soft cancel: 0 credits. Instant delete: billed via Walrus on-chain storage fees (same credit check as upload).

Cancel renewal for a certified Walrus storage upload. Two modes are available:

• Soft cancel (default, instant=false): marks the blob as noRenewal=true.

  The file remains on-chain until its current storage epoch expires (walrusEndEpoch),
  then decommissions naturally. No additional fee is incurred — the remaining prepaid epochs are simply not renewed.

• Instant delete (instant=true): queues an immediate on-chain delete transaction.

  Requires sufficient Walrus storage credits (same check as upload). The Walrus worker executes the delete tx
  and the on-chain delete fee is charged to your Walrus storage balance afterward.
  Can be applied even if soft cancel was already set — it upgrades to instant.

Both modes are idempotent. The job must be in CERTIFIED status and not already

decommissioned.