Geo: Fix registry backfilling

What does this MR do and why?

Describe in detail what your merge request does and why.

Example of the problem:

• If the model table has rows with ID 1, 2, 3.
• And the registry table has rows with foreign key ID 1, 2.
• Then RegistryConsistencyWorker should create registry row with foreign key 3.

Instead, it does this:

• First execution of RegistryConsistencyWorker, it does not create registry row with foreign key 3
• Second execution of RegistryConsistencyWorker, it does create the row
• Third execution it doesn't check anything
• Starts from beginning again

This MR changes the behavior to:

• First execution of RegistryConsistencyWorker, it does create the row
• Starts from beginning again

Resolves #370919 (closed)

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.