fix: logging during cutover; fix: cutover replication delay should be zero

[levkk]

• fix: logging fixes during cutover
• fix: replication delay during cutover should be zero

[codecov]

Codecov Report

❌ Patch coverage is 54.83871% with 14 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...og/src/backend/replication/logical/orchestrator.rs	53.33%	14 Missing ⚠️

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