fix(telemetry): Implement dual-write logging for Systemd integration

This commit refactors the internal logging functions across all core modules to guarantee telemetry reaches the Systemd journal. Sentinels now mirror their physical log outputs directly to the OS `logger`, ensuring flawless `journalctl` visibility even when modules are spawned in detached subshells.

core/runner.sh

@@ -33,8 +33,18 @@ log() {
     
     # 保证日志目录存在
     mkdir -p "${INSTALL_DIR}/logs"
+    
     # 日志格式注入 [版本号] 追踪标识
-    printf "[$(date '+%Y-%m-%d %H:%M:%S')] [v%-5s] [%-5s] [%-7s] [%s] %s\n" "$local_ver" "$level" "$module" "$REGION_CODE" "$msg" >> "$LOG_FILE"
+    local core_msg=$(printf "[v%-5s] [%-5s] [%-7s] [%s] %s" "$local_ver" "$level" "$module" "$REGION_CODE" "$msg")
+    echo "[$(date '+%Y-%m-%d %H:%M:%S')] $core_msg" >> "$LOG_FILE"
+
+    # 强制推送到 Systemd Journal (如果系统支持)
+    if command -v logger >/dev/null 2>&1; then
+        logger -t ip-sentinel "$core_msg"
+    else
+        # 降级输出到 stdout，让 Systemd 捕获
+        echo "$core_msg"
+    fi
 }
 export -f log
 export CONFIG_FILE INSTALL_DIR