Fix routine assignment wakeups

Share issue-assignment wakeup logic between direct issue creation and routine-created execution issues, and add regression coverage for the routine path.

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

server/src/services/issue-assignment-wakeup.ts

@@ -0,0 +1,43 @@
+import { logger } from "../middleware/logger.js";
+
+type WakeupTriggerDetail = "manual" | "ping" | "callback" | "system";
+type WakeupSource = "timer" | "assignment" | "on_demand" | "automation";
+
+export interface IssueAssignmentWakeupDeps {
+  wakeup: (
+    agentId: string,
+    opts: {
+      source?: WakeupSource;
+      triggerDetail?: WakeupTriggerDetail;
+      reason?: string | null;
+      payload?: Record<string, unknown> | null;
+      requestedByActorType?: "user" | "agent" | "system";
+      requestedByActorId?: string | null;
+      contextSnapshot?: Record<string, unknown>;
+    },
+  ) => Promise<unknown>;
+}
+
+export function queueIssueAssignmentWakeup(input: {
+  heartbeat: IssueAssignmentWakeupDeps;
+  issue: { id: string; assigneeAgentId: string | null; status: string };
+  reason: string;
+  mutation: string;
+  contextSource: string;
+  requestedByActorType?: "user" | "agent" | "system";
+  requestedByActorId?: string | null;
+}) {
+  if (!input.issue.assigneeAgentId || input.issue.status === "backlog") return;
+
+  void input.heartbeat
+    .wakeup(input.issue.assigneeAgentId, {
+      source: "assignment",
+      triggerDetail: "system",
+      reason: input.reason,
+      payload: { issueId: input.issue.id, mutation: input.mutation },
+      requestedByActorType: input.requestedByActorType,
+      requestedByActorId: input.requestedByActorId ?? null,
+      contextSnapshot: { issueId: input.issue.id, source: input.contextSource },
+    })
+    .catch((err) => logger.warn({ err, issueId: input.issue.id }, "failed to wake assignee on issue assignment"));
+}