refactor: simplify Docker entrypoints — agent bundles log appender

The agent shaded JAR now includes the log appender classes. Remove
PropertiesLauncher, -Dloader.path, and separate appender JAR references.

All JVM types now use: java -javaagent:/app/agent.jar -jar app.jar
Plain Java uses -cp with explicit main class. Native runs binary directly.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cameleer-server-app/src/main/java/com/cameleer/server/app/runtime/DockerRuntimeOrchestrator.java

@@ -117,16 +117,11 @@ public class DockerRuntimeOrchestrator implements RuntimeOrchestrator {
         String customArgs = request.customArgs() != null && !request.customArgs().isBlank()
                 ? " " + request.customArgs() : "";
         String entrypoint = switch (request.runtimeType()) {
-            case "quarkus" -> "exec java -javaagent:/app/agent.jar" + customArgs + " -jar " + appJarPath;
-            case "plain-java" -> "exec java -javaagent:/app/agent.jar -cp " + appJarPath +
-                    ":/app/cameleer-log-appender.jar" + customArgs + " " + request.mainClass();
+            case "plain-java" -> "exec java -javaagent:/app/agent.jar" + customArgs +
+                    " -cp " + appJarPath + " " + request.mainClass();
             case "native" -> "exec " + appJarPath + customArgs;
-            default -> { // spring-boot (default)
-                    String launcher = request.mainClass() != null ? request.mainClass()
-                            : "org.springframework.boot.loader.launch.PropertiesLauncher";
-                    yield "exec java -javaagent:/app/agent.jar -Dloader.path=/app/cameleer-log-appender.jar" +
-                            customArgs + " -cp " + appJarPath + " " + launcher;
-            }
+            default -> // spring-boot, quarkus, and others all use -jar
+                    "exec java -javaagent:/app/agent.jar" + customArgs + " -jar " + appJarPath;
         };
         createCmd.withEntrypoint("sh", "-c", entrypoint);