feat(safety): implement report content API

crates/quark/src/impl/mongo/mod.rs

@@ -39,6 +39,11 @@ pub mod users {
     pub mod user_settings;
 }
 
+pub mod safety {
+    pub mod report;
+    pub mod snapshot;
+}
+
 #[derive(Debug, Clone)]
 pub struct MongoDb(pub mongodb::Client);