feat: instance administration, bootstrap admin, and managed-tier OAuth gate

Self-hosted instances are now email/password only — OAuth providers
(GitHub/Google/Discord/Microsoft) activate solely when PRIMORA_MANAGED=true,
reserved for the future hosted tier.

Sign-up lifecycle: the first public sign-up becomes the instance admin; after
bootstrap, sign-up closes by default. A better-auth databaseHook gates only
/sign-up/email, so admin-created users and OAuth flows bypass it. The login
page reads GET /instance/public to hide the sign-up tab, show the bootstrap
notice, and render only the providers the instance offers.

Instance settings live in core.settings (migration 00010) and resolve
in-app > env > built-in default, cached 15s. Platform admins (better-auth
user.role) manage sign-up, mail transport, and rate limits via
GET/PUT/DELETE /instance/settings or the new Settings → Instance tab. Secret
values are AES-256-GCM encrypted at rest with PRIMORA_ENCRYPTION_KEY, never
returned by the API, and decrypted by the auth service at send time.

Auth service reads the same settings table for the sign-up gate and mail
config, so in-app changes take effect without a restart.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

packages/api-client/src/generated/index.ts

@@ -69,6 +69,9 @@ export type { HealthStatus } from './models/HealthStatus';
 export { IngestEvent } from './models/IngestEvent';
 export type { IngestRequest } from './models/IngestRequest';
 export type { IngestResponse } from './models/IngestResponse';
+export type { InstancePublicConfig } from './models/InstancePublicConfig';
+export { InstanceSetting } from './models/InstanceSetting';
+export type { InstanceSettingsResponse } from './models/InstanceSettingsResponse';
 export { Integration } from './models/Integration';
 export type { IntegrationAnalytics } from './models/IntegrationAnalytics';
 export type { IntegrationID } from './models/IntegrationID';
@@ -115,6 +118,7 @@ export type { UpdateBucketObjectRequest } from './models/UpdateBucketObjectReque
 export { UpdateBucketRequest } from './models/UpdateBucketRequest';
 export type { UpdateCollectionRequest } from './models/UpdateCollectionRequest';
 export type { UpdateDocumentRequest } from './models/UpdateDocumentRequest';
+export type { UpdateInstanceSettingRequest } from './models/UpdateInstanceSettingRequest';
 export { UpdateOrganizationMemberRoleRequest } from './models/UpdateOrganizationMemberRoleRequest';
 export type { UpdateOrganizationRequest } from './models/UpdateOrganizationRequest';
 export { UpdateProjectMemberRoleRequest } from './models/UpdateProjectMemberRoleRequest';
@@ -192,6 +196,9 @@ export { $HealthStatus } from './schemas/$HealthStatus';
 export { $IngestEvent } from './schemas/$IngestEvent';
 export { $IngestRequest } from './schemas/$IngestRequest';
 export { $IngestResponse } from './schemas/$IngestResponse';
+export { $InstancePublicConfig } from './schemas/$InstancePublicConfig';
+export { $InstanceSetting } from './schemas/$InstanceSetting';
+export { $InstanceSettingsResponse } from './schemas/$InstanceSettingsResponse';
 export { $Integration } from './schemas/$Integration';
 export { $IntegrationAnalytics } from './schemas/$IntegrationAnalytics';
 export { $IntegrationID } from './schemas/$IntegrationID';
@@ -238,6 +245,7 @@ export { $UpdateBucketObjectRequest } from './schemas/$UpdateBucketObjectRequest
 export { $UpdateBucketRequest } from './schemas/$UpdateBucketRequest';
 export { $UpdateCollectionRequest } from './schemas/$UpdateCollectionRequest';
 export { $UpdateDocumentRequest } from './schemas/$UpdateDocumentRequest';
+export { $UpdateInstanceSettingRequest } from './schemas/$UpdateInstanceSettingRequest';
 export { $UpdateOrganizationMemberRoleRequest } from './schemas/$UpdateOrganizationMemberRoleRequest';
 export { $UpdateOrganizationRequest } from './schemas/$UpdateOrganizationRequest';
 export { $UpdateProjectMemberRoleRequest } from './schemas/$UpdateProjectMemberRoleRequest';
@@ -257,6 +265,7 @@ export { AutomationService } from './services/AutomationService';
 export { CollectionsService } from './services/CollectionsService';
 export { DatabasesService } from './services/DatabasesService';
 export { HealthService } from './services/HealthService';
+export { InstanceService } from './services/InstanceService';
 export { IntegrationsService } from './services/IntegrationsService';
 export { OrganizationsService } from './services/OrganizationsService';
 export { PlatformService } from './services/PlatformService';