feat: Add PrismaDatabaseDriver for @nestixis/nestjs-inbox-outbox

[destyk]

Summary

This PR introduces a new Prisma-based database driver for the
@nestixis/nestjs-inbox-outbox library, enabling Inbox/Outbox event
handling without creating additional database connections.

Features

• Full lifecycle support: event creation, persistence, removal, flush, and retry.
• TTL handling: supports readyToRetryAfter, expiresAtTTL, and maxExecutionTimeTTL.
• JSON payload storage: complex event payloads and listener tracking.
• Single PrismaClient usage: no extra database connections.
• Easy NestJS integration via PrismaDatabaseDriverFactory.

Changes

• Added PrismaDatabaseDriver implementing the DatabaseDriver interface.
• Added PrismaDatabaseDriverFactory for NestJS async module integration.
• Created Prisma schema InboxOutboxTransportEvent with BigInt timestamps.
• Added full integration tests covering create, persist, flush, retry, and remove events.

Testing

• Integration tests with in-memory SQLite verify complete driver lifecycle.
• e2e tests ensure proper handling of TTLs, retry logic, and JSON payloads.

Migration / Usage

1. Add InboxOutboxTransportEvent model to your Prisma schema.
2. Use PrismaDatabaseDriverFactory in InboxOutboxModule.registerAsync
   as the driverFactory.
3. No additional Prisma connections are required.

Notes

• expireAt, insertedAt, and readyToRetryAfter use BigInt for millisecond timestamps.
• delivedToListeners and eventPayload are stored as JSON for complex objects.

[destyk]

@axotion check this PR