chore: add exception information to log output when the plugin fails to start

application/src/main/java/run/halo/app/plugin/SpringPlugin.java

@@ -52,6 +52,7 @@ public class SpringPlugin extends Plugin {
             log.error(
                 "Cleaning up plugin resources for plugin {} due to not being able to start plugin.",
                 pluginId);
+            log.debug("Error occurred when starting plugin {}", pluginId, t);
             this.stop();
             // propagate exception to invoker.
             throw t;