fix(runtime): restore required agent-eval peer

[drewstone]

Summary

• restore @tangle-network/agent-eval as a required peer because root and ./loops import it at runtime
• keep the ./environment-provider export from 0.79.1
• add a package check that fails if agent-eval is marked optional again

Verification

• pnpm run lint
• pnpm run typecheck
• env -u INTELLIGENCE_OTLP_ENDPOINT -u OTEL_EXPORTER_OTLP_ENDPOINT pnpm test
• pnpm run build
• pnpm run verify:package
• pnpm run docs:freshness
• pnpm run docs:check
• clean npm app installed the packed tarball and imported @tangle-network/agent-runtime/loops plus @tangle-network/agent-runtime/environment-provider without manually installing @tangle-network/agent-eval

[tangletools]

✅ Auto-approved PR — a004b90d

Blanket team auto-approval is enabled for this reviewer service.
The full PR reviewer audit still runs separately and will publish findings if it detects issues.

_{tangletools · auto-approval · reason: blanket_auto_approve · 2026-06-26T20:48:45Z}