Reference implementation sync: 4 new commits (2026-04-30)

[edburns]

Automated Reference Implementation Sync

There are 4 new commits in the official Copilot SDK since the last merge.

• Last merged commit: dd2dcbc439256acfb9feb2cff07c0b9c820091b8
• Reference implementation HEAD: e42b726ca42bd1b2e099a956c9287ba9435ba3e5

Recent reference implementation commits

e42b726 Update @github/copilot to 1.0.40-0 (#1171)
ecdc5ec Update @github/copilot to 1.0.39 (#1167)
02ff69b Update @github/copilot to 1.0.39-0 (#1157)
c63feb2 fix(dotnet): Add AOT-safe `SetForegroundSessionRequest` for `SetForegroundSessionIdAsync()` (#1144)

Instructions

Follow the agentic-merge-reference-impl prompt to port these changes to the Java SDK.