fix: integrate logging hardening with rebased main (F3 + tauri plugins)

Rebasing onto post-F3 main surfaced two spots the auto-merge left inconsistent:
- profile_handler UpdateIdentityKey path: thread ctx into the writeServiceError
  call (the signature gained a context param in the server logging change)
- identity-pin store lookup: drop a needless borrow flagged by clippy

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Client/tauri-client/src-tauri/src/commands.rs

@@ -241,7 +241,7 @@ pub fn get_identity_pin(
         .store(IDENTITY_PINS_STORE)
         .map_err(|e| format!("failed to open identity pins store: {e}"))?;
 
-    let value = store.get(&identity_pin_key(&host, &user_id)).and_then(|v| {
+    let value = store.get(identity_pin_key(&host, &user_id)).and_then(|v| {
         if let Value::String(s) = v {
             Some(s)
         } else {

Server/api/profile_handler.go

@@ -178,7 +178,7 @@ func handleUpdateProfile(svc *service.Services, broadcaster ProfileBroadcaster)
 		if req.IdentityPublicKey != nil {
 			updated, err = svc.Users.UpdateIdentityKey(r.Context(), user.ID, *req.IdentityPublicKey)
 			if err != nil {
-				writeServiceError(w, err)
+				writeServiceError(r.Context(), w, err)
 				return
 			}
 		}