The wizard POSTs only the new decky on each submit. The handler used to
treat every INI as the complete desired fleet (config.deckies = INI) so
the reconciler tore down prior deckies as orphans — deploying a second
Windows workstation silently wiped the first.
Add replace_fleet to DeployIniRequest (default false). Default path
merges new deckies into existing config and rejects name/IP collisions
with 409. replace_fleet=true preserves set-desired-state semantics for
CLI / declarative callers. Lifecycle rows are created only for the
deckies submitted in the current call, so /deckies/lifecycle?ids=...
reflects exactly what this submit deployed.
build_deckies_from_ini gains reserved_ips so additive auto-allocation
skips IPs already held by the existing fleet.