refactor: change meta_name to immutable reference and add debugging

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

src/meta_plugin/system.rs

@@ -59,7 +59,7 @@ impl MetaPlugin for CwdMetaPlugin {
         // No update needed
     }
 
-    fn meta_name(&mut self) -> String {
+    fn meta_name(&self) -> String {
         self.meta_name.clone()
     }
     
@@ -141,7 +141,7 @@ impl MetaPlugin for UidMetaPlugin {
         // No update needed
     }
 
-    fn meta_name(&mut self) -> String {
+    fn meta_name(&self) -> String {
         self.meta_name.clone()
     }
     
@@ -219,7 +219,7 @@ impl MetaPlugin for UserMetaPlugin {
         // No update needed
     }
 
-    fn meta_name(&mut self) -> String {
+    fn meta_name(&self) -> String {
         self.meta_name.clone()
     }
     
@@ -300,7 +300,7 @@ impl MetaPlugin for GidMetaPlugin {
         // No update needed
     }
 
-    fn meta_name(&mut self) -> String {
+    fn meta_name(&self) -> String {
         self.meta_name.clone()
     }
     
@@ -378,7 +378,7 @@ impl MetaPlugin for GroupMetaPlugin {
         // No update needed
     }
 
-    fn meta_name(&mut self) -> String {
+    fn meta_name(&self) -> String {
         self.meta_name.clone()
     }
     
@@ -459,7 +459,7 @@ impl MetaPlugin for ShellMetaPlugin {
         // No update needed
     }
 
-    fn meta_name(&mut self) -> String {
+    fn meta_name(&self) -> String {
         self.meta_name.clone()
     }
     
@@ -540,7 +540,7 @@ impl MetaPlugin for ShellPidMetaPlugin {
         // No update needed
     }
 
-    fn meta_name(&mut self) -> String {
+    fn meta_name(&self) -> String {
         self.meta_name.clone()
     }
     
@@ -621,7 +621,7 @@ impl MetaPlugin for KeepPidMetaPlugin {
         // No update needed
     }
 
-    fn meta_name(&mut self) -> String {
+    fn meta_name(&self) -> String {
         self.meta_name.clone()
     }
     
@@ -699,7 +699,7 @@ impl MetaPlugin for HostnameMetaPlugin {
         // No update needed for hostname
     }
 
-    fn meta_name(&mut self) -> String {
+    fn meta_name(&self) -> String {
         self.meta_name.clone()
     }
     
@@ -780,7 +780,7 @@ impl MetaPlugin for FullHostnameMetaPlugin {
         // No update needed for full hostname
     }
 
-    fn meta_name(&mut self) -> String {
+    fn meta_name(&self) -> String {
         self.meta_name.clone()
     }