refactor(project): remove async facade exports

[kitlangton]

Summary

• remove the remaining Project runtime-backed async facade exports and service-local runtime
• migrate instance, server, and seed script callers to use Project.Service through a runtime instead of facade helpers
• convert project tests to yield the service from context and keep instance bootstrap on a non-facade runtime path

Testing

• bun typecheck
• bun run test test/project/project.test.ts test/project/migrate-global.test.ts