fix: add static lifetime bound to MetaPlugin trait

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/meta_plugin.rs

@@ -152,7 +152,7 @@ pub fn process_metadata_outputs(internal_name: &str, value: String, outputs: &st
     })
 }
 
-pub trait MetaPlugin {
+pub trait MetaPlugin where Self: 'static {
     fn is_supported(&self) -> bool {
         true
     }