Add HP USB-C and Thunderbolt dock detection with serial extraction and SnipeIT user lookup

[Copilot]

New standalone script to detect connected HP USB-C and Thunderbolt docks, extract their serial numbers, and look up the assigned user from SnipeIT.

Detection strategy

Built from evidence collected on physical systems (Issues #13, #14, #18, #24):

• PID-based: Matches HP VID 03F0 against known dock PIDs — 046B (G5), 0A6B (G2), 0269 (Thunderbolt)
• Name-based fallback: Catches unknown dock models via HP.*(USB|Thunderbolt).*Dock FriendlyName regex
• DisplayLink: Detects HP docks using DisplayLink chipset (VID 17E9, observed on PC1486)

Serial extraction

Serials live on the parent USB Composite Device InstanceId (no &MI_ segment):

USB\VID_03F0&PID_046B\11AD1D0AEFCA3E08291C0B00
                       ^^^^^^^^^^^^^^^^^^^^^^^^ serial

Child interface devices (&MI_XX) are filtered out. Connected (OK) vs. remembered-but-disconnected (Unknown) docks are reported separately.

SnipeIT integration

• Looks up PC by BIOS serial via Get-CimInstance Win32_BIOS, falls back to hostname search
• Retry-on-error pattern matches AssetSelfReport.ps1
• Gracefully handles missing SnipeitPS module, BIOS query failures, unassigned assets
• Config file is optional — dock detection works standalone without it

[kylegordon]

@copilot thunderbolt evidence has been added #24

[Copilot]

@copilot thunderbolt evidence has been added #24

Added HP Thunderbolt Dock support (PID 0269) as a known dock PID in dfa45bd. The Thunderbolt dock's parent composite device (USB\VID_03F0&PID_0269\201604140001) will now be detected and its serial extracted. Also broadened the name-based fallback regex to catch HP.*Thunderbolt.*Dock in addition to USB docks.