Reverse delete deployment operation if reMapImagesToDeps() fails

[nathanielrindlaub]

  // NOTE: this function is called by the task handler
  static async deleteDeployment(
    { cameraId, deploymentId }: gql.DeleteDeploymentInput,
    context: Context,
  ): Promise<HydratedCameraConfig> {
Comment
    try {
      const { project, camConfig } = await retry(
        async () => {
          // find camera config
          const [project] = await ProjectModel.getProjects(
            { _ids: [context.user['curr_project']!] },
            context,
          );
          const camConfig = project.cameraConfigs.find((cc) => idMatch(cc._id, cameraId))!;

          // filter out deployment, sort remaining ones, and save project
          camConfig.deployments = sortDeps(
            camConfig!.deployments.filter(
              (dep) => !idMatch(dep._id!, deploymentId),
            ) as typeof camConfig.deployments,
          );

          await project.save();
	          return { project, camConfig };  // TODO: do we need to return the project and cam config here??
        },
        { retries: 2 },
      );
      // TODO: we need to reverse the above operation if reMapImagesToDeps fails!
      await ProjectModel.reMapImagesToDeps({ projId: project._id, camConfig });
      return camConfig;
    } catch (err) {
      if (err instanceof GraphQLError) throw err;
      throw new InternalServerError(err as string);
    }
  }