collab: Use StripeClient in sync_subscription (#31761)

This PR updates the `sync_subscription` function to use the
`StripeClient` trait instead of using `stripe::Client` directly.

Release Notes:

- N/A

---------

Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>

crates/collab/src/tests/stripe_billing_tests.rs

@@ -172,6 +172,8 @@ async fn test_subscribe_to_price() {
         current_period_start: now.timestamp(),
         current_period_end: (now + Duration::days(30)).timestamp(),
         items: vec![],
+        cancel_at: None,
+        cancellation_details: None,
     };
     stripe_client
         .subscriptions
@@ -211,6 +213,8 @@ async fn test_subscribe_to_price() {
                 id: StripeSubscriptionItemId("si_test".into()),
                 price: Some(price.clone()),
             }],
+            cancel_at: None,
+            cancellation_details: None,
         };
         stripe_client
             .subscriptions
@@ -280,6 +284,8 @@ async fn test_subscribe_to_zed_free() {
                 id: StripeSubscriptionItemId("si_test".into()),
                 price: Some(zed_pro_price.clone()),
             }],
+            cancel_at: None,
+            cancellation_details: None,
         };
         stripe_client.subscriptions.lock().insert(
             existing_subscription.id.clone(),
@@ -309,6 +315,8 @@ async fn test_subscribe_to_zed_free() {
                 id: StripeSubscriptionItemId("si_test".into()),
                 price: Some(zed_pro_price.clone()),
             }],
+            cancel_at: None,
+            cancellation_details: None,
         };
         stripe_client.subscriptions.lock().insert(
             existing_subscription.id.clone(),

crates/collab/src/tests/test_server.rs

@@ -1,3 +1,4 @@
+use crate::stripe_client::FakeStripeClient;
 use crate::{
     AppState, Config,
     db::{NewUserParams, UserId, tests::TestDb},
@@ -522,7 +523,8 @@ impl TestServer {
             llm_db: None,
             livekit_client: Some(Arc::new(livekit_test_server.create_api_client())),
             blob_store_client: None,
-            stripe_client: None,
+            real_stripe_client: None,
+            stripe_client: Some(Arc::new(FakeStripeClient::new())),
             stripe_billing: None,
             executor,
             kinesis_client: None,