Add expires_at field to object returned by subscribers API endpoint

docs/openapi.yaml

@@ -1076,6 +1076,10 @@ components:
           description: Sender address.
           type: string
           example: '0xd8da6bf...'
+        expires_at:
+          description: The date when subscription expires.
+          type: string
+          format: dateTime
     Tag:
       type: object
       properties:

src/mastodon_api/accounts/types.rs

@@ -336,6 +336,7 @@ pub struct ApiSubscription {
     pub id: i32,
     pub sender: Account,
     pub sender_address: String,
+    pub expires_at: DateTime<Utc>,
 }
 
 impl ApiSubscription {
@@ -348,6 +349,7 @@ impl ApiSubscription {
             id: subscription.id,
             sender,
             sender_address: subscription.sender_address,
+            expires_at: subscription.expires_at,
         }
     }
 }

src/models/subscriptions/types.rs

@@ -23,6 +23,7 @@ pub struct Subscription {
     pub id: i32,
     pub sender: DbActorProfile,
     pub sender_address: String,
+    pub expires_at: DateTime<Utc>,
 }
 
 impl TryFrom<&Row> for Subscription {
@@ -36,6 +37,7 @@ impl TryFrom<&Row> for Subscription {
             id: db_subscription.id,
             sender: db_sender,
             sender_address: db_subscription.sender_address,
+            expires_at: db_subscription.expires_at,
         })
     }
 }