This PR merges the latest dev branch changes into master

[mikecarr]

Description

Merge dev into master with recent firmware, stability, and CI updates.

Included in this merge:

• Firmware tab support for Greg’s APFPV source (source selector + source-specific firmware list/download logic + tests)
• 88x2cu WiFi chipset detection update
• Preset sync disabled by default
• Hardened update URL configuration
• Coverage workflow adjustments (restore/build/test flow + permissions/triggers updates)

Related Issue

This PR fixes or closes issue: fixes #
(if no issue exists, replace with: N/A)

Motivation and Context

Bring master up to date with validated changes already merged into dev, including the new APFPV firmware flashing path and reliability/workflow improvements.

How Has This Been Tested

• Verified by test suite on dev branch for firmware changes:
  • dotnet test Companion.Tests/Companion.Tests.csproj --filter FirmwareTabViewModelTests
  • Result: Passed (12/12)
• Additional changes were already merged/tested in dev workflow before this branch merge.

Types of changes

• 🐛 Bug fix (non-breaking change which fixes an issue)
• 🚀 New feature (non-breaking change which adds functionality)
• 🌎 Translation (addition or update a translation)
• ⚙️ Tech (code style improvement, performance improvement or dependencies bump)
• 📚 Documentation (fix or addition in the documentation)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have tested the change locally.