have unique uid's, fixes error in some clients (e.g. sogo)

src/model/event.rs

@@ -427,7 +427,10 @@ WHERE trip_details.id=?
     }
 
     pub(crate) async fn get_vevent(self, db: &SqlitePool) -> ics::Event {
-        let mut vevent = ics::Event::new(format!("{}@rudernlinz.at", self.id), "19900101T180000");
+        let mut vevent = ics::Event::new(
+            format!("event-{}@rudernlinz.at", self.id),
+            "19900101T180000",
+        );
         vevent.push(DtStart::new(format!(
             "{}T{}00",
             self.day.replace('-', ""),
@@ -451,6 +454,7 @@ WHERE trip_details.id=?
             name.push_str(&format!("• {} ", triptype.name))
         }
         vevent.push(Summary::new(name));
+        println!("{:?}", vevent);
         vevent
     }
 

src/model/trip.rs

@@ -138,7 +138,8 @@ WHERE trip_details.id=?
     }
 
     pub(crate) async fn get_vevent(self, user: &User) -> ics::Event {
-        let mut vevent = ics::Event::new(format!("{}@rudernlinz.at", self.id), "19900101T180000");
+        let mut vevent =
+            ics::Event::new(format!("trip-{}@rudernlinz.at", self.id), "19900101T180000");
         vevent.push(DtStart::new(format!(
             "{}T{}00",
             self.day.replace('-', ""),