Delegate the langchain4j-ingest extension to the camel-langchain4j-ingest component

### Description

Apache Camel 4.23.0 introduces the `camel-langchain4j-ingest` component (CAMEL-24621), which provides the same document-ingestion engine this extension has been carrying internally since 3.39.0: splitting, embedding, storing and per-document-id deduplication behind an idempotent repository.

With the component available upstream, the extension should stop maintaining its own copy of that engine and drive the component instead. The extension remains the Quarkus-side declaration surface — the `quarkus.camel.langchain4j.ingest.*` configuration model, the `@Ingest` builder API, build-time validation, CDI bean resolution and native-image support — while each generated pipeline route ends in the component's producer.