fix(kiloclaw): mount morning-briefing plugin HTTP routes via activati… (#3877)

fix(kiloclaw): mount morning-briefing plugin HTTP routes via activation.onStartup

Author: St0rmz1

services/kiloclaw/plugins/kiloclaw-morning-briefing/openclaw.plugin.json

@@ -2,6 +2,9 @@
   "id": "kiloclaw-morning-briefing",
   "name": "KiloClawMorningBriefing",
   "description": "Daily Morning Briefing plugin for KiloClaw-hosted OpenClaw",
+  "activation": {
+    "onStartup": true
+  },
   "configSchema": {
     "type": "object",
     "additionalProperties": false,