Fix key-alarm IM delivery blocked by DSH session sink.

Run session and WhatsApp/IM sinks in parallel so a failing or slow sticky session no longer skips proactive IM delivery (0.1.34).

Co-authored-by: Cursor <cursoragent@cursor.com>

src/netx/alarm-dispatch.ts

@@ -0,0 +1,54 @@
+/**
+ * Fan-out one key-alarm to optional DSH session + IM sinks.
+ * Sinks run in parallel so a failing/slow session path cannot block WhatsApp/IM.
+ */
+
+import type { Context } from '@deepseek-ai/cordis'
+import { deliverAlarmToIm, type AlarmImDeliveryOptions } from './alarm-im.ts'
+import { deliverAlarmToSession } from './alarm-session.ts'
+import type { KeyAlarmPayload } from './alarm-push.ts'
+import type { ImDeliveryTarget } from './im-targets.ts'
+
+export interface AlarmSinkDispatchOptions {
+  deliverDsh: boolean
+  deliverIm: boolean
+  imTargets: readonly ImDeliveryTarget[]
+  lang: string
+}
+
+export interface AlarmSinkFns {
+  toSession?: typeof deliverAlarmToSession
+  toIm?: typeof deliverAlarmToIm
+}
+
+/**
+ * Deliver to every enabled sink; never let one sink's rejection cancel the others.
+ * @returns settled results in order: [session?, im] (session omitted when deliverDsh is false).
+ */
+export async function dispatchAlarmToSinks(
+  ctx: Context,
+  payload: KeyAlarmPayload,
+  options: AlarmSinkDispatchOptions,
+  sinks: AlarmSinkFns = {},
+): Promise<PromiseSettledResult<void>[]> {
+  const toSession = sinks.toSession ?? deliverAlarmToSession
+  const toIm = sinks.toIm ?? deliverAlarmToIm
+  const jobs: Array<Promise<void>> = []
+  if (options.deliverDsh) {
+    jobs.push(toSession(ctx, payload, options.lang))
+  }
+  const imOptions: AlarmImDeliveryOptions = {
+    enabled: options.deliverIm,
+    targets: options.imTargets,
+    lang: options.lang,
+  }
+  jobs.push(toIm(ctx, payload, imOptions))
+
+  const results = await Promise.allSettled(jobs)
+  for (const result of results) {
+    if (result.status === 'rejected') {
+      ctx.logger.warn('netxops alarm-push: sink failed: %s', result.reason)
+    }
+  }
+  return results
+}