Harden live queue runner smoke path

[hudsonaikins]

Summary

• add runner clone retention cleanup for GitHub URL worktrees
• make dashboard queue handoff show active job status and recursion-limit-20 runner command
• add production dashboard build/deploy scripts and post-deploy live smoke proof doc

Live proof

• queued GitHub URL: https://github.com/github/github-mcp-server
• job: job_46a7dfa7-875b-4c64-bc05-554bc30a3ccd
• runner completed with Deep Agent: openrouter:anthropic/claude-sonnet-4.6
• Worker snapshot: 20 findings, 9 graph paths, 29 controls, 4 model calls, 34,330 cached tokens, 0.6234 cache hit ratio

Validation

• uv run pytest -q
• uv run ruff check src/agent_permit/cli.py tests/unit/test_cli.py
• cd dashboard && bun run lint
• cd dashboard && bun run build
• cd dashboard && bun run test:e2e
• cd docs-site && bun run build
• cd worker && bun test
• python3 tools/release_check.py