Provider-era cruft: token_budget_daily, token_budget_monthly, and
allowed_models columns removed from groups table (both dialects).
ResolveTokenBudget() and ResolveModelAllowlist() deleted. GroupPatch
trimmed to name/description/permissions. Admin groups UI simplified
to permissions-only. -283 lines.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>