feat(server): support onetime payment subscription (#8369)

packages/backend/server/src/schema.gql

@@ -143,6 +143,7 @@ input CreateCheckoutSessionInput {
   plan: SubscriptionPlan = Pro
   recurring: SubscriptionRecurring = Yearly
   successCallbackLink: String!
+  variant: SubscriptionVariant
 }
 
 input CreateCopilotPromptInput {
@@ -217,7 +218,7 @@ enum ErrorNames {
   CANNOT_DELETE_ALL_ADMIN_ACCOUNT
   CANNOT_DELETE_OWN_ACCOUNT
   CANT_CHANGE_SPACE_OWNER
-  CANT_UPDATE_LIFETIME_SUBSCRIPTION
+  CANT_UPDATE_ONETIME_PAYMENT_SUBSCRIPTION
   CAPTCHA_VERIFICATION_FAILED
   COPILOT_ACTION_TAKEN
   COPILOT_FAILED_TO_CREATE_MESSAGE
@@ -763,6 +764,11 @@ enum SubscriptionStatus {
   Unpaid
 }
 
+enum SubscriptionVariant {
+  EA
+  Onetime
+}
+
 type UnknownOauthProviderDataType {
   name: String!
 }
@@ -835,6 +841,7 @@ type UserSubscription {
   trialEnd: DateTime
   trialStart: DateTime
   updatedAt: DateTime!
+  variant: SubscriptionVariant
 }
 
 type UserType {