Merge reference implementation SDK changes (2026-05-05)#157

Draft

Copilot wants to merge 3 commits intomainfrom

copilot/reference-impl-sync-expand-sdk-e2e-coverage

Commits on May 5, 2026

Initial plan
Copilot
authored
Port reference implementation changes: process cleanup, connect fallback, and E2E test coverage

Copilot
and
edburns
authored
Update .lastmerge to c063458ecc3d606766f04cf203b11b08de672cc8, sync pom.xml CLI version, and update scripts/codegen @github/copilot version

Copilot
and
edburns
authored