Harden Eclipse runtime proof initialization

[mfoltz]

Summary

• Harden attribute UI initialization so runtime-loaded clients defer until the inventory attribute hierarchy is present.
• Collapse Emberglass bridge progress receipts to one client log line per configs/progress batch while keeping configs received visible.
• Bump Eclipse metadata and changelog to 1.3.16.
• Include the local AGENTS.md agent-guide commit in this branch.

Runtime proof receipts

Preserved locally, not staged as source:

• Server run: .codex\runs\20260517-202509\vshare-eclipse-runtime-proof
• Client run: .codex\runs\bepinex-plugin-set\vshare-eclipse-bloodcraft-runtime-proof\client\20260517-202445

The proof receipts showed the client received and accepted the VShare offer, downloaded Eclipse.dll, hotloaded Eclipse, registered the Emberglass bridge, received configs/progress, sent Eclipse registration, and had zero Eclipse exceptions. Server receipts showed the shared-mod request, transfer offer/accept, transfer dispatch complete, and Bloodcraft receiving Eclipse registration.

Known non-blocker remains unchanged: TargetInfoPanel(Clone) ... not a descendant can still appear while Eclipse UI initialization succeeds.

Verification

• git diff --check
• dotnet restore Eclipse.csproj
• dotnet build Eclipse.csproj --configuration Release -p:DeployToClient=false --no-restore