Make changelog in version response optional (#5115)

* Make changelog on version routes optional

* fix clippy

* fix ci

apps/labrinth/src/models/v2/projects.rs

@@ -306,7 +306,8 @@ pub struct LegacyVersion {
     pub featured: bool,
     pub name: String,
     pub version_number: String,
-    pub changelog: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub changelog: Option<String>,
     pub changelog_url: Option<String>,
     pub date_published: DateTime<Utc>,
     pub downloads: u32,

apps/labrinth/src/models/v3/projects.rs

@@ -661,7 +661,8 @@ pub struct Version {
     /// Games for which this version is compatible with, extracted from Loader/Project types
     pub games: Vec<String>,
     /// The changelog for this version of the project.
-    pub changelog: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub changelog: Option<String>,
 
     /// The date that this version was published.
     pub date_published: DateTime<Utc>,
@@ -714,7 +715,7 @@ impl From<VersionQueryResult> for Version {
             version_number: v.version_number,
             project_types: data.project_types,
             games: data.games,
-            changelog: v.changelog,
+            changelog: Some(v.changelog),
             date_published: v.date_published,
             downloads: v.downloads as u32,
             version_type: match v.version_type.as_str() {