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/entities/calendar_event.rs

@@ -79,6 +79,7 @@ impl CalendarEvent {
      * @param ical_data Complete iCalendar data (VEVENT component)
      * @return Result containing the new CalendarEvent or a domain error
      */
+    #[allow(clippy::too_many_arguments)]
     pub fn new(
         calendar_id: Uuid,
         summary: String,
@@ -165,6 +166,7 @@ impl CalendarEvent {
      * @param updated_at Time when the event was last modified
      * @return Result containing the new CalendarEvent or a domain error
      */
+    #[allow(clippy::too_many_arguments)]
     pub fn with_id(
         id: Uuid,
         calendar_id: Uuid,

src/domain/entities/contact.rs

@@ -35,7 +35,7 @@ impl AddressBook {
         }
     }
 
-    /// Reconstructs from persistence (no validation)
+    #[allow(clippy::too_many_arguments)]
     pub fn from_raw(
         id: Uuid,
         name: String,

src/domain/entities/file.rs

@@ -127,7 +127,7 @@ impl File {
         })
     }
 
-    /// Creates a file with specific timestamps (for reconstruction)
+    #[allow(clippy::too_many_arguments)]
     pub fn with_timestamps(
         id: String,
         name: String,
@@ -196,8 +196,7 @@ impl File {
         self.modified_at
     }
 
-    /// Creates a new File instance from a DTO
-    /// This function is primarily for conversions in batch handlers
+    #[allow(clippy::too_many_arguments)]
     pub fn from_dto(
         id: String,
         name: String,

src/domain/entities/session.rs

@@ -41,8 +41,7 @@ impl Session {
         }
     }
 
-    /// Reconstruct a Session from persisted data (e.g. database row).
-    /// Skips ID generation — uses the provided values directly.
+    #[allow(clippy::too_many_arguments)]
     pub fn from_raw(
         id: String,
         user_id: String,

src/domain/entities/share.rs

@@ -84,8 +84,7 @@ impl Share {
         })
     }
 
-    /// Reconstruct a Share from persisted data (e.g. filesystem/database).
-    /// Skips validation and ID generation — uses the provided values directly.
+    #[allow(clippy::too_many_arguments)]
     pub fn from_raw(
         id: String,
         item_id: String,

src/domain/entities/trashed_item.rs

@@ -41,8 +41,7 @@ impl TrashedItem {
         }
     }
 
-    /// Reconstruct a TrashedItem from persisted data (e.g. JSON index).
-    /// Skips ID generation — uses the provided values directly.
+    #[allow(clippy::too_many_arguments)]
     pub fn from_raw(
         id: Uuid,
         original_id: Uuid,

src/domain/entities/user.rs

@@ -128,7 +128,7 @@ impl User {
         })
     }
 
-    // Create from existing values (for reconstruction from DB)
+    #[allow(clippy::too_many_arguments)]
     pub fn from_data(
         id: String,
         username: String,
@@ -159,7 +159,7 @@ impl User {
         }
     }
 
-    /// Reconstruct from DB with OIDC fields
+    #[allow(clippy::too_many_arguments)]
     pub fn from_data_full(
         id: String,
         username: String,

src/domain/repositories/file_repository.rs

@@ -9,7 +9,6 @@
 //! the infrastructure layer.
 
 use std::path::PathBuf;
-use std::pin::Pin;
 
 use async_trait::async_trait;
 use bytes::Bytes;
@@ -81,13 +80,15 @@ pub trait FileWriteRepository: Send + Sync + 'static {
         content: Vec<u8>,
     ) -> Result<File, DomainError>;
 
-    /// Streaming upload — writes chunks to disk without accumulating in RAM.
-    async fn save_file_from_stream(
+    /// Streaming upload — saves a file from a temp file already on disk.
+    async fn save_file_from_temp(
         &self,
         name: String,
         folder_id: Option<String>,
         content_type: String,
-        stream: Pin<Box<dyn Stream<Item = Result<Bytes, std::io::Error>> + Send>>,
+        temp_path: &std::path::Path,
+        size: u64,
+        pre_computed_hash: Option<String>,
     ) -> Result<File, DomainError>;
 
     /// Moves a file to another folder.

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,