Two small fixes after running the test inside the prod container for
the first time:
- The prod image lays out the backend at /app/app/, not /app/backend/app/
(the Dockerfile.standalone COPYs only the inner package). Use /app
as the sys.path root so `from app.pro.services import ...` resolves.
- The CHIP=0x60 and BLOCK= prints race against the socket drain. The
test was treating "saw CHIP= but BLOCK= not in buffer yet" as a
hard failure and exiting before the second I2C read finished.
Gate the success path on both markers present and keep polling
otherwise.
Verified end-to-end in the prod container:
[proto] >>> ['I2C', '1', '76', 'RR', 'd0', '1']
[proto] <<< I2C_DATA 1 76 60
[proto] >>> ['I2C', '1', '76', 'RR', 'f7', '8']
[proto] <<< I2C_DATA 1 76 530280155e607b50
[test] OK — guest read chip ID = 0x60
[test] OK — block read BLOCK=530280155e607b50
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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