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shankar0123
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Bundle 1 / Phase 2: ships PermissionService, RoleService, ActorRoleService, and the Authorizer primitive that Phase 3 RequirePermission middleware calls on every gated request.
Authorizer.CheckPermission semantics: a grant matches when (a) the permission name equals the requested permission AND (b) the grant is global-scoped OR the grant scope_type+scope_id exactly match the request. Global beats specific; per-resource grants widen the effective set rather than shadowing global. Hot-path query is one ActorRoleRepository.EffectivePermissions JOIN call (already shipped in Phase 1) plus an in-memory walk; Phase 12 will add benchmarks + caching if the JOIN cost shows up at scale.
Privilege-escalation guard: ActorRoleService.Grant and Revoke require the caller to hold auth.role.assign globally. Without it, ErrSelfRoleAssignment. System callers (AsSystemCaller()) bypass the check; bootstrap, migrations, scheduler-initiated grants use this path. Reserved actor actor-demo-anon is rejected on Grant + Revoke so the demo path stays alive even after a misclick (ErrAuthReservedActor).
Caller abstraction: every service entry point takes *Caller (ActorID, ActorType, TenantID, IsSystem). CallerFromContext is a stub returning ErrUnauthenticated; Phase 3 wires the middleware-context bridge that fills the Caller from request context. The contract is pinned by TestCallerFromContext_Phase2ReturnsUnauthenticated so the Phase 3 upgrade is observable.
Audit recording: every mutating service operation calls AuditService.RecordEvent. Bundle 1 Phase 8 adds the event_category column + parameter and back-fills 'auth' for these calls; until then the rows go in with the default category.
Test coverage: in-memory fakeRoleRepo / fakePermissionRepo / fakeActorRoleRepo / fakeAudit pin the privilege-escalation invariants (ErrUnauthenticated for nil caller, ErrForbidden for missing perm, ErrInvalidPermission for non-canonical permission name, ErrSelfRoleAssignment for Grant without auth.role.assign, ErrAuthReservedActor for actor-demo-anon mutations, system-caller bypass) without requiring testcontainers. Phase 12 will add live-Postgres integration coverage.
Branch: dev/auth-bundle-1. Phase 1 was 19497ee (RBAC schema + repo). Phase 3 (middleware integration) is the next commit on this branch.