refactor: rename saved_during_io to is_saved

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

src/meta_plugin/system.rs

@@ -23,7 +23,7 @@ pub struct BinaryMetaPlugin {
     meta_name: String,
     buffer: Vec<u8>,
     max_buffer_size: usize,
-    saved_during_io: bool,
+    is_saved: bool,
     item_id: Option<i64>,
     conn: Option<*mut Connection>,
 }
@@ -34,7 +34,7 @@ impl BinaryMetaPlugin {
             meta_name: "binary".to_string(),
             buffer: Vec::new(),
             max_buffer_size: 4096, // 4KB
-            saved_during_io: false,
+            is_saved: false,
             item_id: None,
             conn: None,
         }
@@ -53,7 +53,7 @@ impl MetaPlugin for BinaryMetaPlugin {
 
     fn finalize(&mut self) -> io::Result<String> {
         // If we already saved during IO, don't save again
-        if self.saved_during_io {
+        if self.is_saved {
             // Return the current value to avoid errors, but it won't be saved again
             let is_binary = is_binary(&self.buffer);
             return Ok(if is_binary { "true".to_string() } else { "false".to_string() });