fix(examples): align SSR smoke fixture with interop contract

[cssbruno]

Summary

• enable the built-in auth addon for the root smoke project so auth.required remains valid
• make the data-free SSR dashboard use go server {} instead of declaring an external server {} load lane
• restore the broad example-report CI gate after the typed interop migration in feat(compiler): harden v1 execution contracts #807

Issue Closure

Follow-up to #807.

Verification

• GOCACHE=/tmp/gowdk-ci-debug-cache go run ./cmd/gowdk check --ssr examples/ssr/*.gwdk
• GOCACHE=/tmp/gowdk-ci-debug-cache sh scripts/check-example-reports.sh
• git diff --check

LLM Assistance

• LLM session summary: Traced the failed GitHub Actions job to the root SSR smoke fixture, reproduced it locally, and aligned the fixture with the typed interop contract.
• Human-reviewed assumptions: Keep the dashboard protected while removing an unused external load lane.
• Follow-up work: None.