feat: finalize topics configuration as code

[exadmin]

Why

Some repository topics were configured manually in the Netcracker organization but were missing from the configuration source of truth.

What

• Synchronize config/topics.json with topics reported by the GitHub API.
• Add missing repositories and topic assignments.
• Preserve all existing configured topic assignments.

How to verify

• Parse config/topics.json as JSON.
• Compare every repository topic returned by the GitHub API against the configuration.
• Run git diff --check.