Add tools/merge_pyxis_release.py, which assembles the four validated
release assets (bootloader, partition table, OTA selector, application)
into a single 8 MiB image at their fixed flash offsets on an erased
canvas, with per-image read-back and gap checks.
Wire it into release-firmware.yml so every tag build publishes
pyxis-<tag>-merged.bin as a release asset, and document the
provisioning semantics in the README: the merged image is a
first-install image (it erases NVS and LittleFS); data-preserving
updates keep using firmware.bin or the Columba .pyxis package.
torlando-agent[bot]
01fc9adc79