fix: align promptfoo adapter variables

[aryeko]

Summary

• return the generic shared eval-kit prompt variables from technical-design generation, pointwise, and pairwise adapter hooks
• preserve technical-design semantics inside source material, candidate instructions, rubrics, and expected item values
• add adapter hook tests that assert the bundled prompt variable contract
• keep @agentic-workflow-kit/eval-kit pinned to the existing Git tag; no local package is reintroduced

Verification

• pnpm eval:unit -- evals/tests/public-reference-cases.test.mjs (red before the adapter fix; green after)
• pnpm format
• pnpm install --frozen-lockfile
• pnpm check
• pnpm eval:case -- --case case-tiny-laundry-pickup-v1 --candidate evals/cases/case-tiny-laundry-pickup-v1/reference-design.md --run-id verify-shared-eval-kit
• git diff --check

Optional model-assisted smoke

• codex login status reports ChatGPT auth
• pnpm eval:generate produced a Promptfoo config with the generic variables, but the external model smoke was not completed because retrying the provider call was blocked by policy as an external transfer of repository prompt content
• pnpm eval:judge:coverage was not run for the same reason

[chatgpt-codex-connector]

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