Comparison with goreplay

I'm not understanding the high-level differences between this and [goreplay](https://github.com/buger/goreplay). They seem to occupy most of the same problem space. Can someone explain if and how they differ in their use cases?

The issue names no files, tests, or entry points; begin by reviewing the project's existing documentation and the linked goreplay project. Done means adding a clear, source-backed comparison of Flashback and goreplay, including their distinct use cases and any meaningful overlap.

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