Issue and milestone should have foreign key to repo

[simonw]

Currently the repo column on those tables is a string simonw/datasette rather than an ID referencing a row in repos.

Originally posted by @simonw in #29 (comment)

[simonw]

The API just gives us the repository_url: https://api.github.com/repos/simonw/datasette/issues

We currently turn that into a simonw/datasette string here:

github-to-sqlite/github_to_sqlite/utils.py

Lines 43 to 46 in e0e8d8c

	# Add repo key
	issue["repo"] = original["repository_url"].split(
	"https://api.github.com/repos/"
	)[1]

[simonw]

Since this represents a breaking schema change for anyone running SQL queries against these tables, I'm going to do a major version bump to 2.0 when I release this.

[simonw]

https://github-to-sqlite.dogsheep.net/github/milestones now link to repo:

And so do issues: https://github-to-sqlite.dogsheep.net/github/issues