VSN-2348 : Adding feature of files local metdata fetching & Introducing storage features.

Merge Request Description

Defining Service Signature

This commit introduces the initial definition of the service signature related to root files retrieval. It establishes the contract that will be used by subsequent implementations to ensure consistency and clarity in the retrieval process.

Implementation of Root Documents Retrieval

This commit provides the concrete implementation of the root documents retrieval functionality. It builds upon the previously defined service signature and ensures that the system can fetch root-level documents effectively.

Exposing Root Files Retrieval via Controller

This commit exposes the root files retrieval functionality through a controller endpoint. This allows external consumers to access the retrieval service via a standardized API interface, ensuring usability and integration with other components.

External User Call for Full Name Retrieval

This commit defines an external call to fetch a user’s full name based on their UUID. The retrieved name is then mapped to the document owner field in the Document Response DTO, ensuring that ownership information is clearly represented and accessible.

Documentation Update – Changelog

This commit updates the project documentation, specifically the changelog, to reflect the newly added features and modifications. It ensures that contributors and stakeholders have a clear record of changes introduced in this merge request.

Closes VSN-2348