chore: Move initial avatar upload to background worker (#3727)

* chore: Async user avatar upload processor

* chore: Async team avatar upload

* Refactor to task for retries

* Docs
Include avatarUrl in task props to prevent race condition
Remove transaction around upload fetch request

server/queues/processors/AvatarProcessor.ts

@@ -0,0 +1,40 @@
+import { Team, User } from "@server/models";
+import { Event, TeamEvent, UserEvent } from "@server/types";
+import UploadTeamAvatarTask from "../tasks/UploadTeamAvatarTask";
+import UploadUserAvatarTask from "../tasks/UploadUserAvatarTask";
+import BaseProcessor from "./BaseProcessor";
+
+export default class AvatarProcessor extends BaseProcessor {
+  static applicableEvents: Event["name"][] = ["users.create", "teams.create"];
+
+  async perform(event: UserEvent | TeamEvent) {
+    // The uploads are performed in a separate task to allow for retrying in the
+    // case of failures as it involves network calls to third party services.
+
+    if (event.name === "users.create") {
+      const user = await User.findByPk(event.userId, {
+        rejectOnEmpty: true,
+      });
+
+      if (user.avatarUrl) {
+        await UploadUserAvatarTask.schedule({
+          userId: event.userId,
+          avatarUrl: user.avatarUrl,
+        });
+      }
+    }
+
+    if (event.name === "teams.create") {
+      const team = await Team.findByPk(event.teamId, {
+        rejectOnEmpty: true,
+      });
+
+      if (team.avatarUrl) {
+        await UploadTeamAvatarTask.schedule({
+          teamId: event.teamId,
+          avatarUrl: team.avatarUrl,
+        });
+      }
+    }
+  }
+}