[PM-6146] generator history (#8497)

* introduce `GeneratorHistoryService` abstraction
* implement generator history service with `LocalGeneratorHistoryService` 
* cache decrypted data using `ReplaySubject` instead of `DerivedState`
* move Jsonification from `DataPacker` to `SecretClassifier` because the classifier 
  is the only component that has full type information. The data packer still handles 
  stringification.

libs/common/src/tools/generator/state/padded-data-packer.ts

@@ -37,7 +37,7 @@ export class PaddedDataPacker extends DataPackerAbstraction {
    * with the frameSize.
    * @see {@link DataPackerAbstraction.unpack}
    */
-  pack<Secret>(value: Secret) {
+  pack<Secret>(value: Jsonify<Secret>) {
     // encode the value
     const json = JSON.stringify(value);
     const b64 = Utils.fromUtf8ToB64(json);