Handle api rate limiting messages more gracefully

[brtran4]

When the bot is overloaded and makes too many requests at fflogs, this is what is returned:

Error finding this character's Lodestone ID from FF Logs: Error executing query: Message: 429 Too Many Requests; body: "{"status":429,"error":"Too many requests. The owner of this API key can subscribe on Patreon to increase their request limit."}", Locations: [], Extensions: map[code:request_error]
To make lookups faster in the future, please link your character in FF Logs to the Lodestone here: https://www.fflogs.com/lodestone/import

We should gracefully handle these error messages and store them in a log rather than having the bot display it countless times.