perf: Phase 4+5 optimizations — uploads 10x, downloads 2x, concurrent 2x. moka cache, 512KB buffers, remove sync_all, hash-on-write, preloaded queries, bench.sh v3, gitignore storage/. 500MB upload 12.6s->1.3s (392MB/s). RSS 69-113MB, 0 swap.

src/domain/services/i18n_service.rs

@@ -18,8 +18,9 @@ pub enum I18nError {
 pub type I18nResult<T> = Result<T, I18nError>;
 
 /// Supported locales
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]
 pub enum Locale {
+    #[default]
     English,
     Spanish,
     French,
@@ -40,7 +41,7 @@ impl Locale {
     }
 
     /// Create from locale code string
-    pub fn from_str(code: &str) -> Option<Self> {
+    pub fn from_code(code: &str) -> Option<Self> {
         match code.to_lowercase().as_str() {
             "en" => Some(Locale::English),
             "es" => Some(Locale::Spanish),
@@ -50,11 +51,6 @@ impl Locale {
             _ => None,
         }
     }
-
-    /// Get default locale
-    pub fn default() -> Self {
-        Locale::English
-    }
 }
 
 /// Interface for i18n service (primary port)

src/domain/services/path_service.rs

@@ -78,15 +78,19 @@ impl StoragePath {
         self.segments.is_empty()
     }
 
-    /// Converts the path to a string with format "/segment1/segment2/..."
-    pub fn to_string(&self) -> String {
+}
+
+impl std::fmt::Display for StoragePath {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         if self.segments.is_empty() {
-            "/".to_string()
+            write!(f, "/")
         } else {
-            format!("/{}", self.segments.join("/"))
+            write!(f, "/{}", self.segments.join("/"))
         }
     }
+}
 
+impl StoragePath {
     /// Returns the path representation as a string
     pub fn as_str(&self) -> &str {
         // Note: The implementation should really store the string,