Deploy main eacf1e7 to prod

Replaces #559, which conflicted.

Model: opus-5-5

internal/middleware/metrics_method_test.go

@@ -50,7 +50,7 @@ func realMethods() []string {
 // dimension varying, so any series growth a probe produces is the
 // method label's and nothing else's.
 func methodProbePath() string {
-	return "/webhook/" + uuid.NewString()
+	return "/h/" + uuid.NewString()
 }
 
 // inventedMethods returns n distinct RFC 9110 method tokens that no