Self-ratelimit requests

[etihwnad]

https://requests-cache.readthedocs.io/en/stable/user_guide/compatibility.html#requests-ratelimiter

[etihwnad]

https://community.libre.space/t/api-and-throttling-anonymous-vs-with-api-token/12091/2

60 requests per hour for anonymous users and 240 requests per hour for authenticated users.

[kerel-fs]

Hi! I've implemented rate-limiting, currently in my branch kerel, where I had patched more things (the new tle_source field too, see #3 ). The goal of those other changes is to make it easy to install the CLI scripts, by packaging them in the python package satbazaar2. If you are interested I'd be happy to prepare Pull Requests!

[etihwnad]

@kerel-fs I'd be happy to work at merging proper rate limiting.

The present strategy to deal with that is ... simple: fetching data from new-to-the-archive obs slows down the rate-limited part enough to (for now) fetch all new obs before being limited. The fetcher then iterates down obs marked "unknown" to get a one-time update to the vetting, which is eventually rate limited. The script exits and we do it again in 4 hours.