feat: migrate configuration from custom format to YAML

- Replace custom directive-based config parser with YAML using gopkg.in/yaml.v3
- Rename config.example.conf to config.example.yml with YAML syntax
- Update default config path to /etc/logcorrelator/logcorrelator.yml
- Update Dockerfile.package to copy YAML config files
- Update packaging scripts to install logcorrelator.yml
- Update architecture.yml to document YAML configuration
- Add yaml.v3 dependency to go.mod

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

packaging/deb/postinst

@@ -37,10 +37,10 @@ case "$1" in
         chmod 750 /etc/logcorrelator
 
         # Install default config if it doesn't exist
-        if [ ! -f /etc/logcorrelator/logcorrelator.conf ]; then
-            cp /usr/share/logcorrelator/logcorrelator.conf.example /etc/logcorrelator/logcorrelator.conf
-            chown logcorrelator:logcorrelator /etc/logcorrelator/logcorrelator.conf
-            chmod 640 /etc/logcorrelator/logcorrelator.conf
+        if [ ! -f /etc/logcorrelator/logcorrelator.yml ]; then
+            cp /usr/share/logcorrelator/logcorrelator.yml.example /etc/logcorrelator/logcorrelator.yml
+            chown logcorrelator:logcorrelator /etc/logcorrelator/logcorrelator.yml
+            chmod 640 /etc/logcorrelator/logcorrelator.yml
         fi
 
         # Enable and start the service (if running in a real system, not container)