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,