fix: production deployment issues

1. session-monitor: handle timestamp-prefixed transcript filenames
   OpenClaw uses {ISO}_{sessionId}.jsonl — glob for *_{sessionId}.jsonl
   when direct path doesn't exist.

2. session-monitor: skip stale sessions (>5min since last transcript write)
   Prevents creating status boxes for every old session in sessions.json.

3. status-watcher: parse actual OpenClaw JSONL transcript format
   Records are {type:'message', message:{role,content:[{type,name,...}]}}
   not {type:'tool_call', name}. Now shows live tool calls with arguments
   and assistant thinking text.

4. handler.js: fix module.exports for OpenClaw hook loader
   Expects default export (function), not {handle: function}.

5. HOOK.md: add YAML frontmatter metadata for hook discovery.

hooks/status-watcher-hook/HOOK.md

@@ -1,13 +1,13 @@
+---
+name: status-watcher-hook
+description: "Auto-starts the Live Status v4 watcher daemon on gateway startup"
+metadata: { "openclaw": { "emoji": "📡", "events": ["gateway:startup"] } }
+---
+
 # status-watcher-hook
 
 Auto-starts the Live Status v4 daemon when the OpenClaw gateway starts.
 
-## Events
-
-```json
-["gateway:startup"]
-```
-
 ## Description
 
 On gateway startup, this hook checks whether the status-watcher daemon is already
@@ -20,18 +20,17 @@ of this hook handler.
 The following environment variables must be set for the watcher to function:
 
 ```
-MM_TOKEN         Mattermost bot token
-MM_URL           Mattermost base URL (e.g. https://slack.solio.tech)
-TRANSCRIPT_DIR   Path to agent sessions directory
-SESSIONS_JSON    Path to sessions.json
+MM_BOT_TOKEN     Mattermost bot token
+MM_BASE_URL      Mattermost base URL (e.g. https://slack.solio.tech)
 ```
 
 Optional (defaults shown):
 
 ```
+TRANSCRIPT_DIR            /home/node/.openclaw/agents
 THROTTLE_MS               500
 IDLE_TIMEOUT_S            60
-MAX_STATUS_LINES          15
+MAX_STATUS_LINES          20
 MAX_ACTIVE_SESSIONS       20
 MAX_MESSAGE_CHARS         15000
 HEALTH_PORT               9090