Add request_id and user_id logging in nginx and services

[ArtemSBulgakov]

Describe the feature

We want to trace users requests to debug issues. For this, we need to add user ids and request ids to each log line: both in Nginx logs and FastAPI logs.

Suggested solution

Пример log_format:
(блок http)

    log_format main '[$time_local] "$http_x_forwarded_for" $remote_addr '
                    '"$server_name" "$request" $status '
                    '"$http_referer" "$http_user_agent" '
                    '$body_bytes_sent $request_time '
                    'auth_user="$remote_user" '
                    'session_id="$session_id"';

Пример пробрасывания переменных в сервис:
(блок server)

    proxy_set_header X-Request-ID $requestid;

Пример возврата переменных клиенту:
(блок server)

    add_header X-Request-ID $requestid;

Пример куки для трекинга браузера:
(блок http)

    map $cookie_session_id $session_id {
        "" $request_id.$msec;
        default $cookie_session_id;
    }
    add_header Set-Cookie "session_id=$session_id; Path=/; HttpOnly; SameSite=Strict; Max-Age=31536000";

Also FastAPI should add header for user id, and Nginx can use this header in log.

FastAPI logging should also print user ids and request ids.

Additional context

No response