feat: expose logicalRestore configs in config projection and UI

Nikolay Samokhvalovrequested to merge
feature/restore-configs-projection into master

Summary

  • Add RestoreConfigs to ConfigProjection so retrieval.spec.logicalRestore.options.configs is visible via GET /admin/config and settable via POST /admin/config and the UI
  • Add "Restore PostgreSQL configs" textarea to the logicalRestore section of the Configuration page (same key=value per line format as tuning params)
  • Tooltip explains purpose and gives common performance examples

Problem

The logicalRestore.options.configs field (PostgreSQL GUCs applied at restore time) was not in the ConfigProjection. Customers setting these parameters — the key lever for speeding up logical restore of large databases — had no UI path and no API feedback to verify the settings were there.

Closes #701 (closed)

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