- Stripe webhook fails closed when the signing secret is missing (outside local/testing).
- ReserveResources places + creates the instance under a per-datacenter lock so
concurrent orders can't overcommit a host.
- CloneVirtualMachine reserves the vmid + breadcrumb BEFORE cloning, so a crash
can't mint a new vmid and orphan the first clone.
- CreateCustomerAdmin checks user existence and resets the password instead of
re-running user:add on retry.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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