feat(connector): Add Opensearch source connector

[ryerraguntla]

Description

Add a Opensearch source connector that polls documents from a Opensearch index and produces JSON messages into Iggy.

Users should be able to ingest Opensearch documents into Iggy streams with stable cursor-based polling and persisted connector state.

Affected area / component

Connectors

Proposed solution

Scope
Add the source connector crate and sample runtime config.
Document source configuration, retry behavior, and primary-key cursor requirements.
Add Docker-backed integration coverage for producing indexed documents.

Alternatives considered

No response

Contribution

• I'm willing to submit a pull request to implement this feature

Good first issue

• I think this could be a good first issue for a new contributor

[pushp-ranja]

@ryerraguntla I can pick this up, for both source and sink connector

[ryerraguntla]

Hi @pushp-ranja Thank you very much for stepping forward. I am about submit PR for source connector. Please go ahead and pick the sink connector

[ryerraguntla]

@pushp-ranja are you on the apache iggy discord community? If not please join and ping in the connectors channel.

[ryerraguntla]

/assign

[pushp-ranja]

I have joined the iggy discord and will look out for other issues.