fix(server): stop a failed notification import from crashing the run

The fire-and-forget notification sends guard the send() call but not the
dynamic import around it, so a rejected import escapes as an unhandled
rejection. In CI that surfaced as an EnvironmentTeardownError from vacay
after the suite had already passed, failing the run with every test green.

trips, packing and collections already catch on the import chain; collab and
the two vacay sends were missing it.

server/src/nest/collab/collab.service.ts

@@ -500,6 +500,6 @@ export class CollabService {
       const params: Record<string, string> = { trip: tripInfo?.title || 'Untitled', actor: actor.email, tripId: String(tripId) };
       if (preview !== undefined) params.preview = preview;
       send({ event: 'collab_message', actorId: actor.id, scope: 'trip', targetId: Number(tripId), params }).catch(() => {});
-    });
+    }).catch(() => {});
   }
 }

server/src/nest/vacay/vacay.service.ts

@@ -636,7 +636,7 @@ export class VacayService {
     // Notify invited user
     import('../notifications/notifications.bridge').then(({ send }) => {
       send({ event: 'vacay_invite', actorId: inviterId, scope: 'user', targetId: targetUserId, params: { actor: inviterEmail, planId: String(planId) } }).catch(() => {});
-    });
+    }).catch(() => {});
 
     return {};
   }
@@ -867,7 +867,7 @@ export class VacayService {
 
     import('../notifications/notifications.bridge').then(({ send }) => {
       send({ event: 'vacay_share', actorId: ownerId, scope: 'user', targetId: targetUserId, params: { actor: ownerEmail } }).catch(() => {});
-    });
+    }).catch(() => {});
 
     return {};
   }