Research official ingress adapters for turning external events into jobs

## Context

Today Awa focuses on queue execution, worker runtime, admin tooling, and language SDKs. It is worth investigating whether Awa should also ship official ingress adapters that turn external events into well-formed jobs.

Examples could include:
- HTTP ingress patterns
- webhook-to-job adapters
- event-stream adapters such as Kafka

## Research Questions

- Which ingress paths are common enough to justify first-party support?
- Should this be a library, a sidecar/service, CLI support, or example/reference implementation?
- How should idempotency, auth, schema validation, and tracing be handled?
- How much of this belongs in core versus companion packages?
- Can ingress adapters improve adoption without bloating the core queue engine?

## Deliverable

A recommendation for whether to:
- keep ingress entirely app-defined,
- ship reference adapters/examples only, or
- add first-party ingress packages/components.

The recommendation should identify the smallest useful first step.