feat: /meta для версии в футере и устойчивый разбор JSON

frontend/src/api/index.ts

@@ -1,5 +1,5 @@
 export type { CreateRacePayload, Race, RacesQuery, RaceStatus, UpdateRacePayload } from "./types";
 export { ApiError, getApiErrorMessage } from "./errors";
-export type { HealthResponse } from "./health";
-export { getHealth } from "./health";
+export type { BackendMetaResponse, HealthResponse } from "./health";
+export { getBackendMeta, getHealth } from "./health";
 export { getRaceById, getRaces, createRace, updateRace, deleteRace } from "./races";