feat: Add VM statistics and fix compilation errors for plugin tests

- Add VM instruction statistics (--vm-stats, --vm-stats-json)
- Fix missing fields in ast.rs test code (public_fields, private_fields)
- Add CliConfig fields for VM statistics
- Enable TLV debug logging in plugin_loader_v2
- Successfully test FileBox handle passing and HTTP plugin creation

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

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

src/ast.rs

@@ -958,6 +958,8 @@ mod tests {
         let box_decl = ASTNode::BoxDeclaration {
             name: "TestBox".to_string(),
             fields: vec!["value".to_string()],
+            public_fields: vec![],
+            private_fields: vec![],
             methods,
             constructors: HashMap::new(),
             init_fields: vec![],