It's hard to start writing queries (both for bugs and pass-rates) from scratch and having a document with set of links is rather annoying to use.
What I propose is a set of curated "named queries" that people can select from a drop down list. E.g. you select "SKL IGT BAT last 5 days" that would end up in "metrics/passrate?named_query=skl-igt-bat-last-5-days" for easier sharing.
Only few people need access to curate those, so django's admin interface for editing should be sufficient.