Write the architecture, emulator and Python bindings chapters

[mikelangmayr]

• Architecture chapter now covers the producer/consumer exposure model, the frame dispatch path, and why frame outputs are forbidden from blocking acquisition
• Emulator chapter lists the Archon commands it actually answers, documents EMULATOR_DATADIR for serving real frames instead of synthetic ones, and states what the emulation does not model
• Python chapter covers the three command routes, RuntimeError on failure, GIL release and its thread-safety limits, and the shape output_status() returns
• Emulator config keys now come from the generated table rather than being restated

All claims checked against the source; the shared-memory non-blocking behaviour is cited to ImageStreamIO_UpdateIm in the writer.

[github-actions]

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2026-09-23 23:18 UTC