feat: - track call length

- move voice and video limits to config
- seperate VoiceInformation into model and db model
- fix build scripts

crates/core/models/src/v0/channels.rs

@@ -158,6 +158,7 @@ auto_derived!(
     pub struct VoiceInformation {
         /// Maximium amount of users allowed in the voice channel at once
         #[cfg_attr(feature = "validator", validate(range(min = 1)))]
+        #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
         pub max_users: Option<u32>
     }
 

crates/core/models/src/v0/messages.rs

@@ -133,7 +133,7 @@ auto_derived!(
         #[serde(rename = "message_unpinned")]
         MessageUnpinned { id: String, by: String },
         #[serde(rename = "call_started")]
-        CallStarted { by: String },
+        CallStarted { by: String, finished_at: Option<Timestamp> },
     }
 
     /// Name and / or avatar override information