fix(heartbeat): exempt wake and hook reasons from empty-heartbeat skip (openclaw#14532) thanks @arosstale

Verified:
- pnpm build
- pnpm check
- pnpm test

Co-authored-by: arosstale <117890364+arosstale@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

src/infra/heartbeat-runner.ts

@@ -426,10 +426,11 @@ export async function runHeartbeatOnce(opts: {
 
   // Skip heartbeat if HEARTBEAT.md exists but has no actionable content.
   // This saves API calls/costs when the file is effectively empty (only comments/headers).
-  // EXCEPTION: Don't skip for exec events or cron events - they have pending system events
-  // to process regardless of HEARTBEAT.md content.
+  // EXCEPTION: Don't skip for exec events, cron events, or explicit wake requests -
+  // they have pending system events to process regardless of HEARTBEAT.md content.
   const isExecEventReason = opts.reason === "exec-event";
   const isCronEventReason = Boolean(opts.reason?.startsWith("cron:"));
+  const isWakeReason = opts.reason === "wake" || Boolean(opts.reason?.startsWith("hook:"));
   const workspaceDir = resolveAgentWorkspaceDir(cfg, agentId);
   const heartbeatFilePath = path.join(workspaceDir, DEFAULT_HEARTBEAT_FILENAME);
   try {
@@ -437,7 +438,8 @@ export async function runHeartbeatOnce(opts: {
     if (
       isHeartbeatContentEffectivelyEmpty(heartbeatFileContent) &&
       !isExecEventReason &&
-      !isCronEventReason
+      !isCronEventReason &&
+      !isWakeReason
     ) {
       emitHeartbeatEvent({
         status: "skipped",