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Preserve serving traffic during cloud warmup and retry transient health failures - #19
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matteius
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The first automatic deployment completed successfully after a transient 502 caused the agent to resume from its checkpoint. Two handoff details caused avoidable disruption: warming cloud changed the admitted placement revision before cloud was ready, and a single failed health request immediately aborted verification.
Preserve the serving revision during cloud warmup, claim the new revision only once cloud is ready, and retry transient HTTP/network health failures within the existing bounded wait. Configuration and ownership errors still fail immediately; exact-image checks remain strict.
Validation: eight release tests pass, including preservation of the admitted warmup revision, 502 recovery, configuration-error failure, and interrupted handoff ownership.