Batch NS glue record lookups

[poyrazK]

Summary

• Add GetRecordsByNames() to DNSRepository interface for batch fetching records by multiple names
• Implement GetRecordsByNames() in PostgresRepository using WHERE LOWER(name) IN (...) query
• Update authority section handling to batch-fetch all glue A records in a single query instead of N queries

Changes

• internal/adapters/repository/postgres.go — new GetRecordsByNames() method
• internal/core/ports/ports.go — interface addition
• internal/dns/server/server.go — batch glue lookups
• Test mocks updated to satisfy interface

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 706aeef6-da44-4dc0-9077-5471b5c9058b

📥 Commits

Reviewing files that changed from the base of the PR and between 94778bd and 155f13e.

📒 Files selected for processing (8)

• internal/adapters/repository/postgres.go
• internal/core/ports/ports.go
• internal/core/services/dns_service_test.go
• internal/core/services/dnssec_service_test.go
• internal/dns/server/chaos_test.go
• internal/dns/server/server.go
• internal/dns/server/server_test.go
• internal/testutil/mock_repo.go

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• Create PR with unit tests
• Commit unit tests in branch release/glue-record-batching

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