declarative relay deployment on hetzner relay-eval.waow.tech

add notes, new relay and impl column #16

Merged zzstoatzz.io
targeting main from relay-eval/add-klbr-and-impl-col
Merged opened by and assigned to zzstoatzz.io
targeting main from relay-eval/add-klbr-and-impl-col
Commits 5

relay-eval: attribute atproto.africa to rsky
relay-eval: add relay.klbr.net + impl column (closes #1)
docs: log 04-09 zlay delivery regression + 04-10 resolution
relay-eval: ad-hoc eval + coverage-history recipes
zlay: add zlay-probe tool + relaxed liveness for cold-start