Bugfix: PowerDNS bugfixes

[iyashnov]

Задача: 1341

1. Теперь при запуске сервиса PowerDNS Auth в контейнер маунтится конфиг со сгенерированным API ключем
2. Домен теперь берется из rootDSE
3. При запросе forward-зон отфильтровываются дефолтные зоны
4. Удален лишний менеджер миграций, который был переименован в use_case (забыл закоммитить удаление в ПРе с миграцией)

[Copilot]

Pull request overview

PR fixes several PowerDNS integration issues by aligning runtime configuration with generated API keys, sourcing the DNS domain from RootDSE, and adjusting zone listing behavior; it also removes an obsolete BIND→PDNS migration manager module.

Changes:

• Filter “default” zones from the PowerDNS Recursor forward-zones listing.
• Use RootDSE as the source of truth for the DNS domain when building DNSSettingsDTO.
• Remove the old BindToPDNSMigrationManager and update packaging compose to mount pdns.conf directly.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
app/ldap_protocol/dns/managers/power_dns_manager.py	Adds filtering logic when returning forward zones from the recursor.
app/ldap_protocol/dns/managers/bind_to_pdns_migrations_manager.py	Removes the old migration manager implementation.
app/ldap_protocol/dns/dns_gateway.py	Changes DNS settings construction to accept domain as an explicit parameter.
app/ioc.py	Fetches domain via RootDSE gateway and passes it into DNS settings builder.
.package/docker-compose.yml	Mounts ./pdns.conf into the pdns_auth container (enables generated API key config usage).

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