Custos Concept figure for community feedback

## Overview
To support better understanding and adoption, we propose drafting and sharing a concept overview figure illustrating the scope of Custos and how its components interact. The visual should help clarify the platform's core concepts, major modules, and integration points for users, contributors, and integrators.

## Request for feedback
Please share your suggestions on:
- What core components or workflows must appear in the figure
- Any existing diagrams or resources we should reference
- The appropriate level of technical detail

Currently using draw.io to illustrate this figure, is there preferred formats or tools for creating and distributing the figure to be included in the repo?

Start by reviewing the proposed concept image in the issue and the Custos repository's existing diagrams or documentation. Gather feedback on the core components, workflows, integration points, technical detail, and preferred distribution format. Done means an agreed concept figure and a clear format or tool choice for including it in the repository.

Written by the indexing model from the issue text.