[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/secret-key-definition.spec.ts

@@ -7,6 +7,28 @@ describe("SecretKeyDefinition", () => {
   const classifier = SecretClassifier.allSecret<{ foo: boolean }>();
   const options = { deserializer: (v: any) => v };
 
+  it("toEncryptedStateKey returns a key", () => {
+    const expectedOptions = {
+      deserializer: (v: any) => v,
+      cleanupDelayMs: 100,
+    };
+    const definition = SecretKeyDefinition.value(
+      GENERATOR_DISK,
+      "key",
+      classifier,
+      expectedOptions,
+    );
+    const expectedDeserializerResult = {} as any;
+
+    const result = definition.toEncryptedStateKey();
+    const deserializerResult = result.deserializer(expectedDeserializerResult);
+
+    expect(result.stateDefinition).toEqual(GENERATOR_DISK);
+    expect(result.key).toBe("key");
+    expect(result.cleanupDelayMs).toBe(expectedOptions.cleanupDelayMs);
+    expect(deserializerResult).toBe(expectedDeserializerResult);
+  });
+
   describe("value", () => {
     it("returns an initialized SecretKeyDefinition", () => {
       const definition = SecretKeyDefinition.value(GENERATOR_DISK, "key", classifier, options);