Feature/rag metering (#75)

* Add metering-rag for RAG token metrics

* Make metering executable

* Add metering-rag to Prom metrics

* Metricate the right queue

* Update templates to include metering-rag

templates/components/trustgraph.jsonnet

@@ -132,5 +132,37 @@ local prompt = import "prompt-template.jsonnet";
 
     },
 
+    "metering-rag" +: {
+    
+        create:: function(engine)
+
+            local container =
+                engine.container("metering-rag")
+                    .with_image(images.trustgraph)
+                    .with_command([
+                        "metering",
+                        "-p",
+                        url.pulsar,
+                        "-i",
+                        "non-persistent://tg/response/text-completion-rag-response",
+                    ])
+                    .with_limits("0.5", "128M")
+                    .with_reservations("0.1", "128M");
+
+            local containerSet = engine.containers(
+                "metering-rag", [ container ]
+            );
+
+            local service =
+                engine.internalService(containerSet)
+                .with_port(8000, 8000, "metrics");
+
+            engine.resources([
+                containerSet,
+                service,
+            ])
+
+    },
+
 } + prompt