Vert.x-aware MDC, structured logging, and audit trail support

Extension API for the REST framework: interfaces, annotations, lifecycle hooks, middleware

Event bus service dispatch with contract-first interfaces and resilience policies

Timer-based cron job scheduling with EVERY_INSTANCE and SINGLE_INSTANCE execution modes

Holder-bound CorrelationContext runtime (mutable impl, factory, mutator, encoders, seeder, Dagger module)

Format-agnostic Kafka runtime: serde SPI, producer/consumer infrastructure, and event bus dispatch

Authentication, authorization, and security context bridging for the REST framework

Persistent delayed job queue: enqueue service, polling verticle, and handler registration

PostgreSQL-backed inbox/outbox persistence: PgInboxRepository, PgOutboxRepository, Flyway DDL, and Dagger module

PostgreSQL persistence for workflow state machines: instance/history/dedup repositories, PgWorkflowEngine, optimistic concurrency, Flyway migrations.

Event bus service dispatch relay for the outbox pattern