Enhance RootPythia resiliency

[ctmbl]

• Handle more status code Handle 404 error #28 Handle 401 error #41 HTTP Requests response status code handlings #42
• Deal with unexpected known exceptions Handle urllib3.exceptions.InvalidChunkLength from urllib3 causing bot to go idle #32
• Reduce RateLimiter requests timeout not to trigger discord.gateway timeout Reduce RateLimiter requests timeout #50
• rework on_ready function