refactor(control-plane): extract SandboxLifecycleManager from SessionDO

packages/control-plane/src/sandbox/index.ts

@@ -2,6 +2,7 @@
  * Sandbox module exports.
  */
 
+// Client
 export {
   ModalClient,
   createModalClient,
@@ -11,3 +12,58 @@ export {
   type WarmSandboxResponse,
   type SnapshotInfo,
 } from "./client";
+
+// Provider interface
+export {
+  SandboxProviderError,
+  type SandboxProvider,
+  type SandboxProviderCapabilities,
+  type CreateSandboxConfig,
+  type CreateSandboxResult,
+  type RestoreConfig,
+  type RestoreResult,
+  type SnapshotConfig,
+  type SnapshotResult,
+  type SandboxErrorType,
+} from "./provider";
+
+// Modal provider
+export { ModalSandboxProvider, createModalProvider } from "./providers/modal-provider";
+
+// Lifecycle decisions
+export {
+  evaluateCircuitBreaker,
+  evaluateSpawnDecision,
+  evaluateInactivityTimeout,
+  evaluateHeartbeatHealth,
+  evaluateWarmDecision,
+  DEFAULT_CIRCUIT_BREAKER_CONFIG,
+  DEFAULT_SPAWN_CONFIG,
+  DEFAULT_INACTIVITY_CONFIG,
+  DEFAULT_HEARTBEAT_CONFIG,
+  type CircuitBreakerState,
+  type CircuitBreakerConfig,
+  type CircuitBreakerDecision,
+  type SandboxState,
+  type SpawnConfig,
+  type SpawnAction,
+  type InactivityState,
+  type InactivityConfig,
+  type InactivityAction,
+  type HeartbeatConfig,
+  type HeartbeatHealth,
+  type WarmState,
+  type WarmAction,
+} from "./lifecycle/decisions";
+
+// Lifecycle manager
+export {
+  SandboxLifecycleManager,
+  DEFAULT_LIFECYCLE_CONFIG,
+  type SandboxStorage,
+  type SandboxBroadcaster,
+  type WebSocketManager,
+  type AlarmScheduler,
+  type IdGenerator,
+  type SandboxLifecycleConfig,
+} from "./lifecycle/manager";