tests: Add multidriver temperature comparison scenario for calibration.

[nedseb]

Closes #99

Summary

• Add tests/scenarios/board_temperature_comparison.yaml — a type: board scenario that reads temperature from 4 sensors simultaneously for cross-validation and calibration
• Add drivers field to board scenarios to trigger mounting lib/ via mpremote mount
• Improve mpremote_bridge.py: run_raw_script() accepts mount_dir, diagnostic output is printed, error messages include both stderr and stdout
• Adapt test_scenarios.py to pass mount_dir when scenario has drivers

Sensors compared

Sensor	Type	Method	Result (sample)
HTS221	Hygrometer/thermometer	temperature()	26.39°C
WSEN-PADS	Barometer	temperature()	25.86°C
WSEN-HIDS	Hygrometer/thermometer	temperature()	20.31°C
LIS2MDL	Magnetometer (auxiliary)	read_temperature_c()	23.5°C

Note: BQ27441 (battery gauge) was excluded — its __init__ calls enterConfig/sealed which crashes with ENODEV. ISM330DL (PR #50) will be added once merged (see #101). BME280 will be added once driver exists (see #102).

Tests

1. Read all temperature sensors — reads 4 sensors, prints comparison table, checks thermometers in [5, 50]°C and spread < 8°C
2. Temperature spread with barometer — cross-checks HTS221 vs WSEN-PADS spread < 5°C
3. Manual validation — operator confirms values are coherent

Hardware validation results

--- Temperature Comparison ---
  HTS221      : 26.39 C
  WSEN-PADS   : 25.86 C
  WSEN-HIDS   : 20.31 C
  LIS2MDL     : 23.5 C
  Spread: 6.08 C

  HTS221: 26.35 C  |  WSEN-PADS: 25.86 C  |  Spread: 0.49 C

Observations

• HTS221 and WSEN-PADS agree well (spread ~0.5°C)
• WSEN-HIDS reads ~6°C below — to investigate (sensor characteristics or calibration issue)
• LIS2MDL with 25°C empirical offset reads ~23.5°C (confirms PR lis2mdl: Add temperature offset correction with calibration method. #98 offset choice)

Related

• PR lis2mdl: Add temperature offset correction with calibration method. #98 — LIS2MDL temperature offset correction (merged)
• PR ism330dl: Add ism330dl driver. #50 — ISM330DL driver (temperature to be added, see tests: Add ISM330DL temperature to multidriver comparison scenario. #101)
• drivers: Harmonize two-point temperature calibration across all sensors. #103 — Temperature calibration harmonization (parent issue)

Test plan

• ruff check passes
• pytest tests/ -k mock — 44/44 passed (no regressions)
• pytest tests/ -k board --collect-only — 3 new tests collected
• Hardware: pytest tests/ --port /dev/ttyACM0 -s -k "Temperature and comparison" — 3/3 passed

[Copilot]

Pull request overview

Adds a new hardware-only board qualification scenario to compare temperatures from multiple onboard sensors, and updates the hardware test runner to support mounting the repository lib/ on-device so multidriver scripts can import drivers during execution.

Changes:

• Add tests/scenarios/board_temperature_comparison.yaml board scenario with 3 hardware checks (2 automated, 1 manual) comparing HTS221, WSEN-HIDS, WSEN-PADS, and LIS2MDL temperatures.
• Extend MpremoteBridge.run_raw_script() to accept an optional mount_dir and print non-JSON diagnostic output before parsing the final JSON result.
• Update tests/test_scenarios.py to mount lib/ for type: board scenarios when a drivers field is present.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 5 comments.

File	Description
tests/test_scenarios.py	Mounts lib/ for board scenarios that declare drivers, then runs the script via run_raw_script(mount_dir=...).
tests/scenarios/board_temperature_comparison.yaml	New multidriver board scenario that imports four drivers from /remote/* and performs spread/range checks plus a manual coherence check.
tests/runner/mpremote_bridge.py	Improves mpremote failure detail selection and adds mount_dir + diagnostic printing to run_raw_script().

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[nedseb]

Suggestions Copilot prises en compte dans le commit 3822374 :

1. _run() — stderr + stdout : le message d'erreur inclut maintenant les deux streams quand ils sont présents.
2. run_raw_script() — gestion d'erreur JSON : try/except JSONDecodeError avec affichage complet de l'output du script.
3. dedicated → thermometers : variable et commentaires renommés pour clarifier que WSEN-PADS (baromètre avec capteur de température intégré) est inclus.
4. PR description : mise à jour — LIS2MDL utilise read_temperature_c() (plus de calcul en dur), ajout référence drivers: Harmonize two-point temperature calibration across all sensors. #103.
5. Accents français : "températures", "cohérentes" corrigés dans le prompt manuel.

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