Реформат путей к эндпоинтам.

Добавлен экстрактор пользователя с дополнительными полями.

Добавлена связь таблиц User и FCM.

Завершена реализация авторизации с помощью VK ID.

Добавлен эндпоинт fcm/update-callback/{version}.

src/routes/schedule/schedule.rs

@@ -0,0 +1,25 @@
+use self::schema::*;
+use crate::app_state::AppState;
+use crate::routes::schedule::schema::{ErrorCode, ScheduleView};
+use crate::routes::schema::{IntoResponseAsError, ResponseError};
+use actix_web::{get, web};
+
+#[utoipa::path(responses(
+    (status = OK, body = ScheduleView),
+    (status = SERVICE_UNAVAILABLE, body = ResponseError<ErrorCode>)
+))]
+#[get("/")]
+pub async fn schedule(app_state: web::Data<AppState>) -> ServiceResponse {
+    match ScheduleView::try_from(&app_state) {
+        Ok(res) => Ok(res).into(),
+        Err(e) => match e {
+            ErrorCode::NoSchedule => ErrorCode::NoSchedule.into_response(),
+        },
+    }
+}
+
+mod schema {
+    use crate::routes::schedule::schema::{ErrorCode, ScheduleView};
+
+    pub type ServiceResponse = crate::routes::schema::Response<ScheduleView, ErrorCode>;
+}