tests: Add calibration test to temperature comparison.

[nedseb]

Summary

• Add a new hardware test that calibrates all temperature sensors (HTS221, WSEN-PADS, LIS2MDL) against WSEN-HIDS as reference
• Uses two-point calibration with a synthetic second point (measured + 10 → ref + 10)
• Prints before/after comparison table and spread
• Verifies that post-calibration spread is < 2°C (vs < 8°C before calibration)
• Update manual check prompt to reference calibrated values

Closes #117

Test plan

Hardware test (STeaMi board)

python3 -m pytest tests/ --port /dev/ttyACM0 -k "Temperature and comparison" -s -v

• All mock tests pass (54/54, this scenario is hardware-only)
• Hardware validation on STeaMi board

Test results

$ python3 -m pytest tests/ --port /dev/ttyACM0 -k "Temperature and comparison" -s -v


======================================================= test session starts ========================================================
platform linux -- Python 3.13.7, pytest-8.3.5, pluggy-1.5.0 -- /usr/bin/python3
cachedir: .pytest_cache
rootdir: /home/nedjar/sandbox/micropython-steami-lib
configfile: pytest.ini
plugins: typeguard-4.4.2
collected 168 items / 164 deselected / 4 selected                                                                                  

tests/test_scenarios.py::test_scenario[Temperature comparison (all sensors)/Read all temperature sensors/hardware] --- Temperature Comparison ---
  LIS2MDL     : 25.12 C
  WSEN-HIDS   : 28.43 C
  WSEN-PADS   : 26.86 C
  HTS221      : 28.54 C
  Spread: 1.68 C
PASSED
tests/test_scenarios.py::test_scenario[Temperature comparison (all sensors)/Temperature spread with barometer/hardware] HTS221: 28.54 C  |  WSEN-PADS: 26.86 C  |  Spread: 1.68 C
PASSED
tests/test_scenarios.py::test_scenario[Temperature comparison (all sensors)/Calibrate all sensors to WSEN-HIDS reference/hardware] --- Before calibration ---
  WSEN-HIDS (ref): 28.24 C
  HTS221:          28.39 C
  WSEN-PADS:       26.85 C
  LIS2MDL:         25.12 C
  Spread: 3.26 C
--- After calibration ---
  WSEN-HIDS (ref): 28.43 C
  HTS221:          28.28 C
  WSEN-PADS:       28.24 C
  LIS2MDL:         28.24 C
  Spread: 0.19 C
PASSED
tests/test_scenarios.py::test_scenario[Temperature comparison (all sensors)/Temperature values feel correct/hardware]   [MANUAL] Les températures calibrées sont-elles cohérentes entre elles et avec l'ambiance ? [Entree=oui / Echap=non] 
PASSED

=========================================== 4 passed, 164 deselected in 86.26s (0:01:26) ===========================================

[Copilot]

Pull request overview

Adds a new hardware-only calibration validation step to the existing board-level temperature comparison scenario, using WSEN-HIDS as the reference to calibrate the other onboard temperature sensors.

Changes:

• Adds a hardware_script step to calibrate HTS221, WSEN-PADS, and LIS2MDL against WSEN-HIDS and assert a tighter post-calibration spread.
• Prints before/after temperature readings and spread for easier manual inspection.
• Updates the manual verification prompt to reference calibrated temperatures.

---

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[nedseb]

Addressed Copilot review:

• Drift temporel : la référence WSEN-HIDS est relue juste avant chaque capteur pour minimiser la dérive
• Gain = 1.0 : remplacé calibrate_temperature() par set_temp_offset() puisqu'on ne valide que l'offset (pas de second point de température disponible). Renommé le test en "Offset-align" pour refléter ce qui est réellement testé
• Prompt trompeur : reformulé sans supposer que l'étape de calibration a été exécutée

[semantic-release-updater]

🎉 This PR is included in version 0.0.2 🎉

The release is available on GitHub release

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