feat(ql3): establish 3.0 incubation baseline

back/runtime/ports/persistedExecutionController.ts

@@ -0,0 +1,24 @@
+import type { ExecutionStopReason, ExecutorType } from '../domain/execution';
+
+export type PersistedExecutionStopStatus =
+  | 'termination_requested'
+  | 'already_exited'
+  | 'identity_mismatch'
+  | 'pid_mismatch'
+  | 'unsupported'
+  | 'invalid';
+
+export interface PersistedExecutionStopResult {
+  status: PersistedExecutionStopStatus;
+  termSignalSent: boolean;
+  killSignalSent: boolean;
+}
+
+export interface PersistedExecutionController {
+  readonly executorType: ExecutorType;
+  stop(input: {
+    durableHandle: string;
+    expectedPid?: number;
+    reason: ExecutionStopReason;
+  }): Promise<PersistedExecutionStopResult>;
+}