[GRiveraDT]

Adds KingFisher Flex support for executing local BindIt BDZ files with the matching 96DW head, tip comb and plates. PLR validates the complete export, preserves its generated command sequence, and can handle loading, unloading and protocol pauses through asynchronous confirmation callbacks. Callbacks replace the corresponding instrument pauses; physical Start remains available when callbacks are omitted.

The driver uses pylabrobot.io.HID for identification, explicit initialization, serialized execution, progress/temperature events and abort. Unsupported exports fail before execution, and errors, timeouts or cancellation invalidate the session without retrying motion. The PR includes offline inspection/audit commands, a usage notebook, API documentation and self-contained simulated tests.

Hardware validation covers firmware 1.01.0 on macOS with mixing, bead collection/release, precollection/postmix, both drying positions, timed pauses/loops, reagent-addition confirmations and 37 °C heating. Tip-comb attachment is not verified by firmware completion; the driver remains experimental. Protocol generation, upload, other head/plate formats and virtual advancement of onboard pauses are outside this implementation. Onboard inventory and launch are available, with launch validated only through the first loading prompt.

Validation:

• KingFisher package, HID transport and CLI: 97 tests and 83 parameterized checks passed (10 existing ElementTree deprecation warnings in the shared BDZ tests).
• Type checking and lint/format checks for the Flex package.
• Notebook structure and code syntax validated without executing hardware cells. The Sphinx build passes on the original base; after updating to current main, the full build reports autosummary warnings in unrelated resource/API pages. No Flex documentation warnings were reported.
• Offline preflight and simulated execution of 18 local BDZ inputs in both physical and host-confirmed pause modes.