Three-tier settings resolution (global → team → user) with per-key
user_overridable flag in package manifests. Admins can lock settings
that team admins and users cannot override.
- Add package_team_settings table (migration 010)
- Add GetTeamSettings/SetTeamSettings/DeleteTeamSettings to PackageStore
- Add ResolveSettings, ParseSettingsSchema, FilterOverridableKeys
- Rewrite Starlark settings.get() to use cascade resolver
- Add TeamID to RunContext for team-aware resolution
- Enforce user_overridable on user settings save
- Add team package settings API (GET/PUT/DELETE)
- 12 unit tests for cascade resolution
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
