Delay initialization of retry hooks

[hynek]

Fixes #31

Is this what you had in mind @ofek?

[ofek]

Closer, but structlog is still being imported

[ofek]

Scratch that, I had to ignore the cache to install. This works and now the important time is spent in tenacity and dataclasses:

❯ python -m timeit -n 1 -r 1 "import stamina"
1 loop, best of 1: 87.8 msec per loop

[hynek]

So, we're good here?

[ofek]

Yes, thanks!

[hynek]

Cool, it's good I tackled it before adding customization to instrumentation otherwise I might've painted myself into a corner.

[hynek]

Out of curiosity, how did you produce that graph?

[ofek]

https://github.com/nschloe/tuna