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Phase 3 of deployment-strategies plan. Refactor executeAsync to dispatch on DeploymentStrategy.fromWire(config.deploymentStrategy()). Blue-green (default): - Start all N new replicas (gen-suffixed names coexist with old). - Wait for ALL healthy (strict — partial-healthy = FAILED, preserves previous deployment untouched). - Only then find + stop the previous deployment. - Final status is always RUNNING; DEGRADED is now reserved for post-deploy replica crashes (set by DockerEventMonitor). Rolling: stub — throws UnsupportedOperationException for now, gets its real implementation in Phase 4. Refactor details: - Extract DeployCtx record to carry 13 per-deploy values around. - Extract startReplica(ctx, i, stateOut) — shared by both strategy paths. - Extract persistSnapshotAndMarkRunning(ctx, primaryCid) — shared finalizer. - Rename waitForAnyHealthy → waitForAllHealthy (the name was misleading; the method already waited for all, just returned partial on timeout). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>