update kafka and http message formatting

runtime/binding-http/src/main/java/io/aklivity/zilla/runtime/binding/http/internal/HttpEventFormatter.java

@@ -48,7 +48,7 @@ public String format(
         case REQUEST_ACCEPTED:
         {
             HttpRequestAcceptedExFW ex = extension.requestAccepted();
-            result = String.format("%s %s %s %s %s", identity(ex.identity()), asString(ex.scheme()), asString(ex.method()),
+            result = String.format("%s %s %s://%s%s", identity(ex.identity()), asString(ex.method()), asString(ex.scheme()),
                 asString(ex.authority()), asString(ex.path()));
             break;
         }

runtime/binding-kafka/src/main/java/io/aklivity/zilla/runtime/binding/kafka/internal/KafkaEventFormatter.java

@@ -49,7 +49,7 @@ public String format(
         case AUTHORIZATION_FAILED:
         {
             KafkaAuthorizationFailedExFW ex = extension.authorizationFailed();
-            result = String.format("%s", identity(ex.identity()));
+            result = String.format("Unable to authenticate client with identity (%s).", asString(ex.identity()));
             break;
         }
         case API_VERSION_REJECTED:
@@ -61,10 +61,10 @@ public String format(
         return result;
     }
 
-    private static String identity(
-        StringFW identity)
+    private static String asString(
+            StringFW stringFW)
     {
-        int length = identity.length();
-        return length <= 0 ? "-" : identity.asString();
+        String s = stringFW.asString();
+        return s == null ? "" : s;
     }
 }

specs/binding-http.spec/src/main/scripts/io/aklivity/zilla/specs/binding/http/config/v1.1/server.event.yaml

@@ -25,7 +25,7 @@ telemetry:
           - qname: test.net0
             id: binding.http.request.accepted
             name: BINDING_HTTP_REQUEST_ACCEPTED
-            message: "- http GET localhost:8080 /"
+            message: "- GET http://localhost:8080/"
 bindings:
   net0:
     type: http

specs/binding-http.spec/src/main/scripts/io/aklivity/zilla/specs/binding/http/config/v2/server.event.yaml

@@ -25,7 +25,7 @@ telemetry:
           - qname: test.net0
             id: binding.http.request.accepted
             name: BINDING_HTTP_REQUEST_ACCEPTED
-            message: "- http GET localhost:8080 /"
+            message: "- GET http://localhost:8080/"
 bindings:
   net0:
     type: http