docs: Enhance Rustdoc for CompressionService, StatusService, and MetaPluginExec

Co-authored-by: aider (openai/andrew/openrouter/sonoma-sky-alpha) <aider@aider.chat>

src/services/status_service.rs

@@ -13,14 +13,23 @@ use std::str::FromStr;
 /// configuration, storage paths, compression engines, metadata plugins,
 /// and filter plugins. It provides a unified interface for status reporting
 /// used by both CLI and server modes.
+///
+/// # Examples
+///
+/// ```
+/// let service = StatusService::new();
+/// let status = service.generate_status(&mut cmd, &settings, data_path, db_path);
+/// ```
 pub struct StatusService;
 
 impl StatusService {
     /// Creates a new `StatusService` instance.
     ///
+    /// No specific initialization is needed; it's a stateless service.
+    ///
     /// # Returns
     ///
-    /// A new `StatusService` instance.
+    /// * `StatusService` - A new instance.
     ///
     /// # Examples
     ///
@@ -35,23 +44,28 @@ impl StatusService {
     ///
     /// Collects data about paths, compression engines, available and configured
     /// meta plugins, and filter plugins. Uses the provided settings to determine
-    /// enabled components.
+    /// enabled components. Handles error reporting via Clap if needed.
     ///
     /// # Arguments
     ///
-    /// * `cmd` - Mutable reference to the Clap command for error reporting.
-    /// * `settings` - Application settings containing configuration.
-    /// * `data_path` - Path to the data storage directory.
+    /// * `cmd` - Mutable reference to the Clap command for error reporting (e.g., invalid plugins).
+    /// * `settings` - Application settings containing configuration details like enabled plugins.
+    /// * `data_path` - Path to the data storage directory for item files.
     /// * `db_path` - Path to the SQLite database file.
     ///
     /// # Returns
     ///
-    /// `StatusInfo` - Structured status information.
+    /// * `StatusInfo` - A structured object containing all status details, including paths, plugins, and config.
+    ///
+    /// # Errors
+    ///
+    /// Exits via Clap error if invalid meta plugin types are configured in settings.
     ///
     /// # Examples
     ///
     /// ```
     /// let status = service.generate_status(&mut cmd, &settings, data_path, db_path);
+    /// assert!(!status.filter_plugins.is_empty());
     /// ```
     pub fn generate_status(
         &self,
@@ -100,9 +114,11 @@ impl StatusService {
 impl Default for StatusService {
     /// Returns the default `StatusService` instance.
     ///
+    /// Delegates to `new()` for consistency.
+    ///
     /// # Returns
     ///
-    /// A new `StatusService`.
+    /// * `StatusService` - A new instance.
     fn default() -> Self {
         Self::new()
     }