docs: add RFC-conformance.md, fix full Level 1 conformance (including malformed-wire FORMERR), restructure integration testing, add wire-level tests, and rename threated→threaded#3

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copilot/add-rfc-conformance-documentation

Commits on Mar 12, 2026

Commits on Mar 13, 2026

fix: return REFUSED for out-of-zone queries (RFC 1034 §6.2)

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test: remove duplicate out-of-zone test

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feat: add apex SOA to authority for NXDOMAIN and NODATA responses (RFC 2308)

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refactor: use rcode/authority/answer variables in zone reader block, no early returns

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Refactor _update_response
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Fix test-docker.yml
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feat: validate QDCOUNT == 1, return FORMERR for zero or multiple questions

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Refactor test_dns_server_udp_handler.py
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Refactor test_dns_server_udp_handler.py
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feat: validate QCLASS == IN, return REFUSED for non-IN queries

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feat: validate QCLASS == IN, return REFUSED for non-IN queries
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feat: validate QCLASS == IN, return REFUSED for non-IN queries
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feat: validate opcode, return NOTIMP for non-QUERY opcodes

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Commits on Mar 14, 2026

Commits on Mar 15, 2026