⭐ feat: Upgrade to asynchronous event bus with retry queue and backoff strategy (#290)

## Description
<!-- Briefly describe the purpose and scope of your changes -->


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Introduced a retry and dead-letter queue system for more robust event
processing.
- Added a retry handler for processing failed Lambda invocations with
exponential backoff.
- Enhanced event handling to support retry logic and improved error
management.

- **Refactor**
- Replaced SQS-based library event processing with an event bus-based
approach.
- Updated event names and structure for improved clarity and
consistency.
  - Removed legacy library queue and related infrastructure.

- **Chores**
  - Updated dependencies to include the AWS Lambda client.
  - Cleaned up unused code and removed deprecated event handling logic.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/functions/package.json

@@ -20,6 +20,7 @@
   "dependencies": {
     "@actor-core/bun": "^0.8.0",
     "@actor-core/file-system": "^0.8.0",
+    "@aws-sdk/client-lambda": "^3.821.0",
     "@aws-sdk/client-s3": "^3.806.0",
     "@aws-sdk/client-sqs": "^3.806.0",
     "@nestri/core": "workspace:",