Start inserting the `uuid` values into the `security_findings` table

Why are we doing this work

We are in the process of deprecating the usage of the project_fingerprint attribute of the findings. By using uuid values to identify findings, we can easily associate any related entity with finding.

We should save the uuid values for the security_findings records while creating them in the database.

Implementation plan

• backend Save uuid values for the security_findings records while creating them in StoreFindingMetadataService