atomizeChangeset produces wrong result when the changes has a new object

[laulautrup]

Thank you for a great project. Love the way you can use id’s for arrays. I do however have a problem when using atomizeChangeset with objects:

const oldData = () => {
  return {
    planet: "Tatooine",
    characters: [{ id: "LUK", name: null }],
  };
};

const newData = () => {
  return {
    planet: "Tatooine",
    characters: [{ id: "LUK", name: { firstName: "Luke", lastName: "Skywalker" } }],
  };
};

const options = {
  embeddedObjKeys: { ".characters": "id" },
};

// Get the diffs between oldData and newData
const originalDiffs = diff(oldData(), newData(), options);

// Atomize and then unatomize the diffs
const atomizedDiffs = atomizeChangeset(originalDiffs);
const unatomizedDiffs = unatomizeChangeset(atomizedDiffs);

// Applying the original diffs produces the expected result:
// {planet: "Tatooine", characters: [{id: "LUK", name: {firstName: "Luke", lastName: "Skywalker"}}]}
const dataWithOriginalDiffs = applyChangeset(oldData(), originalDiffs);

// Applying the unatomized diffs produces an unexpected result:
// {planet: "Tatooine", characters: [{id: "LUK"}, {firstName: "Luke", lastName: "Skywalker"}]}
// The 'name' object is pushed as a new element in the 'characters' array, which is not expected.
const dataWithUnatomizedDiffs = applyChangeset(oldData(), unatomizedDiffs);

// The expectation was that the unatomized diffs would yield the same result as the original diffs.
console.log(JSON.stringify(dataWithOriginalDiffs) === JSON.stringify(dataWithUnatomizedDiffs));

I need to use atomizeChangeset to have more control over the changes that are applied. Hope you can help me out.