Update plugin extension classes

src/main/groovy/seqeralabs/plugin/NfNIMExtension.groovy

@@ -18,9 +18,7 @@ package seqeralabs.plugin
 
 import groovy.transform.CompileStatic
 import nextflow.Session
-import nextflow.plugin.extension.Function
 import nextflow.plugin.extension.PluginExtensionPoint
-
 /**
  * Implements a custom function which can be imported by
  * Nextflow scripts.
@@ -32,14 +30,4 @@ class NfNIMExtension extends PluginExtensionPoint {
     protected void init(Session session) {
     }
 
-    /**
-     * Say hello to the given target.
-     *
-     * @param target
-     */
-    @Function
-    void sayHello(String target) {
-        println "Hello, ${target}!"
-    }
-
 }

src/main/groovy/seqeralabs/plugin/NfNIMFactory.groovy

@@ -18,19 +18,18 @@ package seqeralabs.plugin
 
 import groovy.transform.CompileStatic
 import nextflow.Session
-import nextflow.trace.TraceObserver
-import nextflow.trace.TraceObserverFactory
-
+import nextflow.trace.TraceObserverFactoryV2
+import nextflow.trace.TraceObserverV2
 /**
  * Implements a factory object required to create
  * the {@link NfNIMObserver} instance.
  */
 @CompileStatic
-class NfNIMFactory implements TraceObserverFactory {
+class NfNIMFactory implements TraceObserverFactoryV2 {
 
     @Override
-    Collection<TraceObserver> create(Session session) {
-        return List.<TraceObserver>of(new NfNIMObserver())
+    Collection<TraceObserverV2> create(Session session) {
+        return List.<TraceObserverV2>of(new NfNIMObserver())
     }
 
 }

src/main/groovy/seqeralabs/plugin/NfNIMObserver.groovy

@@ -18,24 +18,13 @@ package seqeralabs.plugin
 
 import groovy.transform.CompileStatic
 import groovy.util.logging.Slf4j
-import nextflow.Session
-import nextflow.trace.TraceObserver
-
+import nextflow.trace.TraceObserverV2
 /**
  * Implements an observer that allows implementing custom
  * logic on nextflow execution events.
  */
 @Slf4j
 @CompileStatic
-class NfNIMObserver implements TraceObserver {
-
-    @Override
-    void onFlowCreate(Session session) {
-        println "Pipeline is starting! 🚀"
-    }
+class NfNIMObserver implements TraceObserverV2 {
 
-    @Override
-    void onFlowComplete() {
-        // Pipeline completion - no message needed
-    }
 }