fix(search) : disable client-side filtering when server-search is active

SearchSelect was filtering results client-side on label only, hiding
server results matched by reference. Add serverSearch prop to bypass
client filter when the API already handles search.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/components/machine/AddEntityToMachineModal.vue

@@ -44,6 +44,7 @@
           :empty-text="`Aucun ${entityLabelLower} disponible dans cette catégorie`"
           :option-label="entityOptionLabel"
           :option-description="entityOptionDescription"
+          server-search
           @search="handleEntitySearch"
         />
       </div>