Summary

• remove Galileo-specific contrib wiring from the root Makefile and replace it with discovery-driven contrib targets
• make root test, lint, typecheck, and build cover every discovered contrib package via python3 scripts/contrib_packages.py names
• add a blocking contrib packaging drift gate to CI and run make check as the single blocking Python path

Why

Phase 3 of the contrib packaging rollout makes root correctness include every real contrib package and keeps CI aligned with the developer entrypoint instead of letting separate CI steps drift.

Validation

• python3 scripts/contrib_packages.py names
• python3 scripts/contrib_packages.py verify
• make test-extras (fails on an existing stacked Galileo package-local tooling issue: plain uv run pytest cannot find pytest)
• make lint (fails on the same existing Galileo package-local tooling issue: plain uv run ruff cannot find ruff)
• make typecheck (fails on the same existing Galileo package-local tooling issue: plain uv run mypy cannot find mypy)
• make check (started after make sync; server tests errored under local DB assumptions before the contrib phase, so the run was terminated after confirming the environment-bound blocker)
• make build

Stacked context

This branch currently includes stacked foundation commits from the local integration of feature/contrib-discovery and feature/contrib-budget-check-fixes. A follow-on rebase or restack against the final landed base branches will likely be needed before merge.

Design Context

• Shared design doc and implementation plan: https://gist.github.com/lan17/823617097f4b7e9f4ff717979de7dba4