perf(heartbeat): drive retry promotion from durable deadlines (#18387)

Reviewed and verified at f1c48c924d.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

server/src/modules/run-dispatch/adapters/postgres.ts

@@ -511,6 +511,15 @@ export function createPostgresRunDispatchAdapter(
     return decideScheduledRetryGate(factsResult.facts, input.now);
   }
 
+  async function nextScheduledRetryAt(input: { cutoff: Date | null }): Promise<number | null> {
+    const [row] = await db.select({ at: heartbeatRuns.scheduledRetryAt }).from(heartbeatRuns)
+      .where(and(eq(heartbeatRuns.status, "scheduled_retry"),
+        sql`jsonb_typeof(${heartbeatRuns.resultJson}->'startupCancellation') is distinct from 'object'`,
+        input.cutoff ? gte(heartbeatRuns.createdAt, input.cutoff) : undefined))
+      .orderBy(asc(heartbeatRuns.scheduledRetryAt)).limit(1);
+    return row?.at?.getTime() ?? null;
+  }
+
   async function listDueRetries(input: ListDueRetriesInput): Promise<DueRetryRun[]> {
     const rows = await db
       .select()
@@ -518,6 +527,7 @@ export function createPostgresRunDispatchAdapter(
       .where(
         and(
           eq(heartbeatRuns.status, "scheduled_retry"),
+          sql`jsonb_typeof(${heartbeatRuns.resultJson}->'startupCancellation') is distinct from 'object'`,
           lte(heartbeatRuns.scheduledRetryAt, input.now),
           input.cutoff ? gte(heartbeatRuns.createdAt, input.cutoff) : undefined,
         ),
@@ -1414,6 +1424,7 @@ export function createPostgresRunDispatchAdapter(
 
   return {
     evaluateScheduledRetryGate,
+    nextScheduledRetryAt,
     listDueRetries,
     cancelStaleQueuedRun,
     dispatchResolvedInteractionIfCurrent,