feat!: add telegram auth and async refactor

- Removed "/schedule/update-download-url" endpoint, this mechanism was replaced by Yandex Cloud FaaS. Ура :)
- Improved schedule caching mechanism.
- Added Telegram WebApp authentication support.
- Reworked endpoints responses and errors mechanism.
- Refactored application state management.
- Make synchronous database operations, middlewares and extractors to asynchronous.
- Made user password field optional to support multiple auth methods.
- Renamed users table column "version" to "android_version" and made it nullable.

migrations/2025-05-28-191056_make_users_password_nullable/down.sql

@@ -0,0 +1,2 @@
+UPDATE users SET "password" = '' WHERE "password" IS NULL;
+ALTER TABLE users ALTER COLUMN "password" SET NOT NULL;