Added new internal attributes $createdBy and$ updatedBy

[ArnabChatterjee20k]

Added new internal attributes $createdBy and$ updatedBy

Summary by CodeRabbit

• New Features

  • Track and expose creator/updater metadata (createdBy, updatedBy) across create/read/update/upsert/bulk and increment operations; new getters return these values.

• Storage

  • Schemas, projections, indexes and size calculations updated to persist createdBy/updatedBy.

• API

  • Increment/update flows now propagate updater information so mutations record who performed them.

• Tests

  • Added e2e/unit coverage for createdBy/updatedBy and made many tests isolation-safe with dynamic names and updated expectations.