Ensure IsSkySeries property is carried forward for 'merged' devices

[AaFortner]

Description

Ensures that 'merged' devices carry forward the IsSkySeries property during device discovery in YubiKeyDeviceListener

Fixes: #156

Type of change

• Refactor (non-breaking change which improves code quality or performance)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How has this been tested?

Added a new integration test: YubiKeyDeviceListenerTests.KeyArrived_SkyEe_IsSkySeriesIsTrue

Test configuration:

• Firmware version: 5.7.1
• Yubikey model: A NFC SKY EE

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have run dotnet format to format my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[github-actions]

Test Results: Windows

    2 files      2 suites   4s ⏱️
3 703 tests 3 703 ✅ 0 💤 0 ❌
3 705 runs  3 705 ✅ 0 💤 0 ❌

Results for commit b6d9cbf.

[github-actions]

Test Results: Ubuntu

    2 files      2 suites   10s ⏱️
3 695 tests 3 695 ✅ 0 💤 0 ❌
3 697 runs  3 697 ✅ 0 💤 0 ❌

Results for commit b6d9cbf.

[github-actions]

Test Results: MacOS

    2 files      2 suites   4s ⏱️
3 695 tests 3 695 ✅ 0 💤 0 ❌
3 697 runs  3 697 ✅ 0 💤 0 ❌

Results for commit b6d9cbf.

[github-actions]

Package	Line Rate	Branch Rate	Complexity	Health
Yubico.Core	43%	32%	4221	➖
Yubico.YubiKey	50%	47%	19164	➖
Summary	49% (32204 / 66078)	44% (8200 / 18591)	23385	➖

Minimum allowed line rate is 40%

[DennisDyallo]

Thank you @AaFortner !