7f7a48880f
Lay the foundation for tenant-level RBAC without enforcing it yet. Schema, types, middleware lookup, and login-flow shape changes ship now; RequireRole/route annotations and member-management endpoints follow in PR 2 and PR 3. Highlights: - New tenant_members table (Postgres + SQLite) with (user_id, tenant_id) unique key and (owner|admin|contributor|viewer) role values. Migration 000043 backfills one row per existing user, marking the earliest-created active user in each tenant as Owner and the rest as Contributor. - KnowledgeBase.creator_id and CustomAgent.runnable_by_viewer added so PR 2 can wire ownership-based and Viewer-runtime checks. - Auth middleware loads the active TenantMember row, sets a new TenantRoleContextKey, and falls back via three escape hatches: cross-tenant superusers (CanAccessAllTenants) get Admin in the target tenant; orphan tenants (zero members) auto-promote the first authenticating human to Owner; and when tenant.enable_rbac is false (the v1 default) unmatched lookups fail open with Admin to preserve current behaviour. - Register / OIDC provisioning now insert an Owner membership for the registrant via TenantMemberService.EnsureOwner. - LoginResponse renamed tenant -> active_tenant and gained a memberships array. POST /auth/switch-tenant issues a fresh token pair scoped to a target membership; GET /auth/config exposes auth.registration_mode for the frontend register-tab gating. - New config keys: auth.registration_mode (self_serve | invite_only, defaults to self_serve) and tenant.enable_rbac (defaults to false). Both have WEKNORA_* env overrides. - Frontend store persists memberships and exposes currentTenantRole; Login.vue calls /auth/config and hides the Register tab in invite_only mode. Go SDK types updated to match the new LoginResponse shape.