feat: add options to meta plugins

Co-authored-by: aider (openai/andrew/openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>

src/meta_plugin/binary.rs

@@ -12,6 +12,7 @@ pub struct BinaryMetaPlugin {
     is_saved: bool,
     item_id: Option<i64>,
     outputs: std::collections::HashMap<String, serde_yaml::Value>,
+    options: std::collections::HashMap<String, serde_yaml::Value>,
 }
 
 impl BinaryMetaPlugin {
@@ -50,6 +51,7 @@ impl BinaryMetaPlugin {
             is_saved: false,
             item_id: None,
             outputs: final_outputs,
+            options: final_options,
         }
     }
     
@@ -140,4 +142,12 @@ impl MetaPlugin for BinaryMetaPlugin {
         options.insert("max_buffer_size".to_string(), serde_yaml::Value::Number(4096.into()));
         options
     }
+    
+    fn options(&self) -> &std::collections::HashMap<String, serde_yaml::Value> {
+        &self.options
+    }
+    
+    fn options_mut(&mut self) -> &mut std::collections::HashMap<String, serde_yaml::Value> {
+        &mut self.options
+    }
 }