refactor: remove manual Debug implementation for MetaPluginCommand

Co-authored-by: aider (openai/andrew/openrouter/deepseek/deepseek-chat-v3.1) <aider@aider.chat>

src/services/error.rs

@@ -1,7 +1,6 @@
-use derive_more::From;
 use thiserror::Error;
 
-#[derive(Error, Debug, From)]
+#[derive(Error, Debug)]
 pub enum CoreError {
     #[error("Database error: {0}")]
     Database(#[from] rusqlite::Error),
@@ -17,6 +16,6 @@ pub enum CoreError {
     Compression(String),
     #[error(transparent)]
     Other(#[from] anyhow::Error),
-    #[from]
-    Migration(#[error(ignore)] rusqlite_migration::Error),
+    #[error("Migration error: {0}")]
+    Migration(#[from] rusqlite_migration::Error),
 }