Initial commit: logcorrelator with unified packaging (DEB + RPM using fpm)

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

packaging/deb/prerm

@@ -0,0 +1,29 @@
+#!/bin/bash
+set -e
+
+# prerm script for logcorrelator .deb package
+
+case "$1" in
+    remove|deconfigure)
+        # Stop and disable the service
+        if [ -x /bin/systemctl ] && [ -d /run/systemd/system ]; then
+            systemctl stop logcorrelator.service 2>/dev/null || true
+            systemctl disable logcorrelator.service 2>/dev/null || true
+            systemctl daemon-reload
+        fi
+        ;;
+
+    upgrade)
+        # On upgrade, just stop the service (will be restarted by postinst)
+        if [ -x /bin/systemctl ] && [ -d /run/systemd/system ]; then
+            systemctl stop logcorrelator.service 2>/dev/null || true
+        fi
+        ;;
+
+    *)
+        echo "prerm called with unknown argument '$1'" >&2
+        exit 1
+        ;;
+esac
+
+exit 0