feat: add HTTPS record type (RFC 9460) support

[poyrazK]

Summary

• Add HTTPS record type (RFC 9460) support with full SVCB parameter handling
• HTTPS records provide service binding hints for HTTP-aware clients
• Supports: priority, target, alpn, port, ipv4hint, ipv6hint, echconfig, no-default
• AliasMode (priority 0) works like CNAME for zone apex

Changes

• core/domain: Added TypeHTTPS constant and HTTPS fields to Record struct
• packet: Added HTTPS QueryType (65), DNSRecord HTTPS fields, Read/Write wire format
• repository: Added HTTPS conversion between domain and wire format
• server: Added HTTPS to queryTypeToRecordType mapping
• docs: ADR 0011 explaining design decisions and RFC 9460 compliance
• test: 10 test cases covering all SVCB params, round-trip, and edge cases

RFC References

• RFC 9460: HTTPS DNS Records
• RFC 9461: SVCB and HTTPS record semantics

Test plan

• go build ./... passes
• go test -short ./... passes
• go test -v -run HTTPS ./internal/dns/packet/... - 10 tests pass

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: dde6979c-da9d-4b75-9ec5-72760860e98d

📥 Commits

Reviewing files that changed from the base of the PR and between e140584 and 8042561.

📒 Files selected for processing (8)

• README.md
• docs/decisions/0011-https-record-support.md
• features.md
• internal/adapters/repository/postgres.go
• internal/core/domain/dns.go
• internal/dns/packet/https_test.go
• internal/dns/packet/packet.go
• internal/dns/server/server.go

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch release/https-record-support

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[poyrazK]

It's okay to merge