Add audit logs

[dmytro-dorofeiev]

Add audit logs
The logging system in Immudb is inadequate. I'm unable to verify if anyone attempted unauthorized access through brute-force methods or if there has been any data leakage. I would like to have the option to log the IP addresses of every user accessing the system.

[ostafen]

@dmytro-dorofeiev: This feature is now available in immudb v1.9.5, which adds a new option --log-access (IMMUDB_LOG_ACCESS env) for enabling logging of each server access.