[PM-9613] port forwarders to integrations (#10075)

* introduced forwarder integrations
* simply contexts
* report error and message when both are present in an RPC response

libs/common/src/tools/state/secret-classifier.ts

@@ -1,5 +1,7 @@
 import { Jsonify } from "type-fest";
 
+import { Classifier } from "./classifier";
+
 /** Classifies an object's JSON-serializable data by property into
  *  3 categories:
  *  * Disclosed data MAY be stored in plaintext.
@@ -10,7 +12,9 @@ import { Jsonify } from "type-fest";
  *  Data that cannot be serialized by JSON.stringify() should
  *  be excluded.
  */
-export class SecretClassifier<Plaintext extends object, Disclosed, Secret> {
+export class SecretClassifier<Plaintext extends object, Disclosed, Secret>
+  implements Classifier<Plaintext, Disclosed, Secret>
+{
   private constructor(
     disclosed: readonly (keyof Jsonify<Disclosed> & keyof Jsonify<Plaintext>)[],
     excluded: readonly (keyof Plaintext)[],