Decision spike for the firmware/test/ host harness (split of bf-4ne).
Records why the ESP-IDF --target linux / Unity-host path was rejected:
csi.c is blocked by esp_wifi.h and provision.c by driver/uart.h, and
firmware/main builds as one component whose REQUIRES line names
esp_wifi/bt/driver — none of which have a linux build. Falls back to a
plain gcc harness under firmware/test/ that does not link main/*.c.
Reason must be carried into bf-4ne's test-runner header comment.
Co-Authored-By: Claude <noreply@anthropic.com>
