Format Go with gofmt, then golines -m 77 (closes #215)

script/fmt now runs golines -m 77 after gofmt, repeating golines until
it changes nothing, since one pass can leave a line the next splits.
script/fmt-check fails when either would change a file.
script/bootstrap installs golines v0.13.0 with go install, pinned to
its commit, and checks the installed version with go version -m.

The tree is reformatted. The longer lines this makes are fixed by
hand: nolint directives moved onto their own line above the statement,
one string split, and 20 functions over funlen's 80 lines shortened or
split, RunWAF and limitPercentages among them.

Model: opus-5-5

internal/waf/countries.go

@@ -18,7 +18,11 @@ type countries struct{}
 
 func (countries) name() string { return "countries" }
 
-func (countries) check(_ context.Context, rq *request, _ time.Time) *verdict {
+func (countries) check(
+	_ context.Context,
+	rq *request,
+	_ time.Time,
+) *verdict {
 	allowed := rq.h.config.ExclusivelyAllowedCountries
 	country := rq.line.Country