fix(Vehicle): use standard PX4 airspeed calibration value (5.1)

[DonLakeFlyer]

Stable_V5.1 version of #14780, replacing #14774 — thanks to @tustin-dev for identifying this and submitting the original fix!

Summary

Use the standard MAVLink value 2 for airspeed calibration in MAV_CMD_PREFLIGHT_CALIBRATION param6. PX4 deprecated 1 in Feb 2017 but still accepts both, so this is a spec-compliance cleanup: 2 matches the MAVLink spec and what PX4's own commander calibrate airspeed CLI sends.

The unit test from #14774 was dropped — see #14780 for the rationale.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (Stable_V5.1@cb8e822). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
src/Vehicle/Vehicle.cc	0.00%	1 Missing ⚠️

❌ Your patch check has failed because the patch coverage (0.00%) is below the target coverage (30.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@              Coverage Diff               @@
##             Stable_V5.1   #14781   +/-   ##
==============================================
  Coverage               ?   32.61%           
==============================================
  Files                  ?      784           
  Lines                  ?    67564           
  Branches               ?    31292           
==============================================
  Hits                   ?    22035           
  Misses                 ?    30666           
  Partials               ?    14863           

Flag	Coverage Δ
unittests	32.61% <0.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/Vehicle/Vehicle.cc	29.08% <0.00%> (ø)

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[github-actions]

Build Results

Platform Status

Platform	Status	Details
Linux	Passed	View
Windows	Passed	View
MacOS	Passed	View
Android	Passed	View

All builds passed.

Pre-commit

Check	Status	Details
pre-commit	Failed (non-blocking)	View

Pre-commit hooks: 0 passed, 0 failed, 0 skipped.

Test Results

linux-coverage-integration: 37 passed, 0 skipped
linux-coverage-unit: 117 passed, 0 skipped
linux-sanitizers-integration: 20 passed, 0 skipped
linux-sanitizers-unit: 117 passed, 0 skipped
Total: 291 passed, 0 skipped

Code Coverage

Coverage	Baseline	Change
69.3%	69.4%	-0.0%

Artifact Sizes

Artifact	Size	Δ from master
QGroundControl	221.79 MB	-4.40 MB (decrease)
QGroundControl-aarch64	179.34 MB	-0.01 MB (decrease)
QGroundControl-installer-AMD64	137.83 MB	-0.48 MB (decrease)
QGroundControl-installer-AMD64-ARM64	80.37 MB	-0.22 MB (decrease)
QGroundControl-installer-ARM64	109.11 MB	-0.03 MB (decrease)
QGroundControl-linux	87.03 MB	-78.74 MB (decrease)
QGroundControl-mac	87.03 MB	No change
QGroundControl-x86_64	191.58 MB	No change
Total size decreased by 83.87 MB

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_{Updated: 2026-08-08 16:58:05 UTC • Commit: 735e982 • Triggered by: Android}