feat(ql3): establish 3.0 incubation baseline

back/runtime/ports/runDispatchLeaseExpirySource.ts

@@ -0,0 +1,23 @@
+export const MAX_RUN_DISPATCH_LEASE_EXPIRY_PAGE_SIZE = 64;
+
+export interface RunDispatchLeaseExpiryCursor {
+  expiresAtMs: number;
+  attemptId: string;
+}
+
+export interface ExpiredRunDispatchLeaseCandidate
+  extends RunDispatchLeaseExpiryCursor {
+  runId: string;
+}
+
+export interface ListExpiredRunDispatchLeasesOptions {
+  observedAtMs: number;
+  after?: RunDispatchLeaseExpiryCursor;
+  limit?: number;
+}
+
+export interface RunDispatchLeaseExpirySource {
+  listExpired(
+    options: ListExpiredRunDispatchLeasesOptions,
+  ): Promise<readonly ExpiredRunDispatchLeaseCandidate[]>;
+}