Create RC database layer

rc_database/src/schema/campaign_difficulty_completion.rs

@@ -0,0 +1,31 @@
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, Eq, DeriveEntityModel)]
+#[sea_orm(table_name = "campaigns_completion")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: u32,
+    pub campaign_id: u32,
+    pub creation_time: i64, // seconds since unix epoch
+    pub level: u32,
+    pub wave: u32,
+    pub complete: bool,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {
+    #[sea_orm(
+        belongs_to = "super::campaign::Entity",
+        from = "Column::CampaignId",
+        to = "super::campaign::Column::Id"
+    )]
+    Campaign,
+}
+
+impl Related<super::campaign::Entity> for Entity {
+    fn to() -> RelationDef {
+        Relation::Campaign.def()
+    }
+}
+
+impl ActiveModelBehavior for ActiveModel {}