feat: add multi-distro RPM packaging for CentOS 7 and Rocky Linux 8/9/10

- Create RPM maintainer scripts (post, preun, postun)
- Add Docker build stages for each target distribution (el7, el8, el9, el10)
- Update architecture.yml with supported RPM distributions
- Update build.sh to extract distro-specific RPM packages

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

packaging/rpm/postun

@@ -0,0 +1,17 @@
+#!/bin/bash
+# postun script for logcorrelator RPM package
+# Compatible with CentOS 7, Rocky Linux 8, 9, 10
+
+set -e
+
+# $1 = 0: package is being removed
+# $1 = 1: package is being upgraded
+if [ -x /bin/systemctl ]; then
+    systemctl daemon-reload
+    if [ "$1" -ge 1 ]; then
+        # Package upgrade, restart service
+        systemctl try-restart logcorrelator.service
+    fi
+fi
+
+exit 0