copySnapshot between zones fails with: Timeout waiting for response from storage host

[nabassa1323]

Problem

copySnapshot between zones fails with:
Timeout waiting for response from storage host

The destination SSVM actually finishes the HTTP download (vmdk/nvram/ovf) in seconds.
Files are present on destination secondary storage, but the management server never
marks the copy as successful.

Versions

4.22.1.0 (also present on current main)
Hypervisor: VMware
Reproduced 5+ times, always ~90s timeout.

Root cause

DownloadListener.getAccountIdForDataObject() handles TEMPLATE and VOLUME only.
For SNAPSHOT it returns null, then:

Long accountId = getAccountIdForDataObject();
Account account = _accountMgr.getAccount(accountId);

Copying a template between the same zones works.

Steps to reproduce

1. VMware zone A + zone B, NFS secondary in both
2. Create a volume snapshot, wait until BackedUp
3. copySnapshot from zone A to zone B
4. Dest SSVM log: Download Completion ... status=DOWNLOAD_FINISHED
5. MS log: timeout after ~90s — UI: Failed to copy snapshot

Expected

Snapshot Ready on destination image store, snapshot_zone_ref updated.

Actual

Job failed. No snapshot_store_ref row on dest store. Orphan files may remain on dest NFS.

[boring-cyborg]

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