feat: HA scheduler leadership + templated email log

HA scheduler: the job scheduler and alert evaluator hold session-scoped
PostgreSQL advisory locks on pinned pool connections — replicas scan for
due work exactly once, failover verified live with two replicas. Manual
and hook-triggered runs stay available on any replica.

Email surface: mailer renders registered templates (invitation); every
send is logged to core.email_log with status and error text. New
GET /projects/:id/emails endpoint; Members page shows an Email log card.

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

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

@@ -67,6 +67,8 @@ export type { DeployMarker } from './models/DeployMarker';
 export type { Document } from './models/Document';
 export type { DocumentID } from './models/DocumentID';
 export type { DocumentListResponse } from './models/DocumentListResponse';
+export { EmailLogEntry } from './models/EmailLogEntry';
+export type { EmailLogListResponse } from './models/EmailLogListResponse';
 export type { ErrorEnvelope } from './models/ErrorEnvelope';
 export type { EventSeriesBucket } from './models/EventSeriesBucket';
 export type { HealthStatus } from './models/HealthStatus';
@@ -207,6 +209,8 @@ export { $DeployMarker } from './schemas/$DeployMarker';
 export { $Document } from './schemas/$Document';
 export { $DocumentID } from './schemas/$DocumentID';
 export { $DocumentListResponse } from './schemas/$DocumentListResponse';
+export { $EmailLogEntry } from './schemas/$EmailLogEntry';
+export { $EmailLogListResponse } from './schemas/$EmailLogListResponse';
 export { $ErrorEnvelope } from './schemas/$ErrorEnvelope';
 export { $EventSeriesBucket } from './schemas/$EventSeriesBucket';
 export { $HealthStatus } from './schemas/$HealthStatus';
@@ -291,6 +295,7 @@ export { AlertsService } from './services/AlertsService';
 export { AutomationService } from './services/AutomationService';
 export { CollectionsService } from './services/CollectionsService';
 export { DatabasesService } from './services/DatabasesService';
+export { EmailService } from './services/EmailService';
 export { HealthService } from './services/HealthService';
 export { InboundService } from './services/InboundService';
 export { InstanceService } from './services/InstanceService';