Fix movie webhook processing and organize NFOGuard fields

- Fix WebhookBatcher missing nfo_manager attribute that caused movie processing errors
- Move NFOGuard comment from top to bottom of episode NFOs with other NFOGuard fields
- All NFOGuard additions now grouped together at bottom for better organization

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

core/nfo_manager.py

@@ -742,22 +742,16 @@ class NFOManager:
                 lockdata = ET.SubElement(episode, "lockdata")
                 lockdata.text = "true"
             
-            # Add NFOGuard comment at the beginning
-            comment_text = f" Created by {self.manager_brand} - Source: {source} "
+            # Add NFOGuard comment at the bottom with other NFOGuard fields
+            nfoguard_comment = ET.Comment(f" Created by {self.manager_brand} - Source: {source} ")
+            episode.append(nfoguard_comment)
             
             # Write file with proper formatting
             tree = ET.ElementTree(episode)
             ET.indent(tree, space="  ", level=0)
             
-            # Write to string first to add comment
-            xml_str = ET.tostring(episode, encoding='unicode')
-            
-            # Add XML declaration and comment
-            full_xml = f'<?xml version="1.0" encoding="utf-8"?>\n<!--{comment_text}-->\n{xml_str}'
-            
-            # Write to file
-            with open(nfo_path, 'w', encoding='utf-8') as f:
-                f.write(full_xml)
+            # Write to file normally (ET will handle the comment properly)
+            tree.write(nfo_path, encoding='utf-8', xml_declaration=True)
             
             print(f"✅ Successfully created/updated episode NFO: {nfo_path}")
             print(f"   S{season_num:02d}E{episode_num:02d}, Aired: {aired}, Date Added: {dateadded}")