Allow for producing/consuming non-Strings

W want to be able to produce more complex objects than Strings

example:
```

class MyClass {
int a;
String b;
}

Class Test {
@Test
public void test() {
MyClass myObject = new MyClass(2;"Value");
PhasedTestManager.produce("storedMyClass", myObject);
}
```

Start by locating the implementation and existing tests for PhasedTestManager.produce, then trace how produced values are stored and consumed. Define how a MyClass-like object can round-trip without breaking existing String usage, and verify the behavior with tests for both production and consumption.

Written by the indexing model from the issue text.