reduce vu update frequency, report more sql errors, fix bug with startup show time

src/scene/mod.rs

@@ -9,6 +9,7 @@ pub mod conversation;
 pub struct StageDirection {
     pub episode_number: u32,
     #[serde(skip)]
+    #[serde(default="StageDirection::default_end_time")]
     pub end_time: DateTime<Utc>,
     pub narrative: String,
 }
@@ -17,13 +18,17 @@ impl StageDirection {
     pub fn time_remaining(&self) -> Duration {
         self.end_time.signed_duration_since(Utc::now())
     }
+
+    fn default_end_time() -> DateTime<Utc> {
+        Utc::now() + Duration::hours(2)
+    }
 }
 
 impl Default for StageDirection {
     fn default() -> Self {
         Self {
             episode_number: 0,
-            end_time: Utc::now() + Duration::hours(2),
+            end_time: Self::default_end_time(),
             narrative: Default::default(),
         }
     }