fix(webapp): limit mutations answer concurrent changes with a 409

Author: matt-aitken

apps/webapp/app/routes/api.v1.concurrency-limits.$name.override.ts

@@ -27,6 +27,11 @@ const route = createActionApiRoute(
           switch (error.type) {
             case "limit_not_found":
               return json({ error: "Concurrency limit not found" }, { status: 404 });
+            case "conflict":
+              return json(
+                { error: "The limit changed concurrently; retry the request" },
+                { status: 409 }
+              );
             case "invalid_override":
               return json({ error: error.message }, { status: 400 });
             default:

apps/webapp/app/routes/api.v1.concurrency-limits.$name.reset.ts

@@ -23,6 +23,11 @@ const route = createActionApiRoute(
         switch (error.type) {
           case "limit_not_found":
             return json({ error: "Concurrency limit not found" }, { status: 404 });
+          case "conflict":
+            return json(
+              { error: "The limit changed concurrently; retry the request" },
+              { status: 409 }
+            );
           case "limit_not_overridden":
             return json({ error: "Concurrency limit has no override to reset" }, { status: 400 });
           default: