feat: include as215932.net in loop scope

[Svaag]

Summary

Extend the production Engineering Loop managed-repo contract from the prior seven core repos to include the AS/routing identity repo:

• Add AS215932/as215932.net to CORE_REPOS.
• Map it to the as215932.net checkout name.
• Discover as215932.net in sibling workspaces alongside hyrule-*, engineering-loop, and infra checkouts.
• Add tests for the repo mapping and discovery.

Safety

• This does not enable the timer.
• The loop still stops at draft PRs only.
• Existing low-and-slow budgets are unchanged.
• as215932.net remains AS/routing identity; no broad domain-policy replacement is implied.

Validation

• uv run --group dev python -m pytest -q tests/test_phase24_daemon.py tests/test_phase8_repo_adapter.py
• uv run --group dev mypy --strict src
• uvx ruff check src tests

Network-operations follow-up

After merge, network-operations#228 should pin engineering_loop_version to the merged SHA and add the as215932.net workspace checkout/deployment repo entry.