feat: implement M1 — core DoH forwarding

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- Axum HTTP server with /dns-query endpoint (GET + POST per RFC 8484)
- DNS wire-format parsing via hickory-proto
- Upstream DoH client with round-robin selection
- TOML config file with resolver definitions
- SERVFAIL fallback when upstream is unreachable
- /health endpoint
- Unit tests (7) and integration tests (5)
- Zero warnings, clippy clean, fmt clean

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This commit is contained in:

Mohamad Khani

2026-07-06 16:42:28 +03:30

parent b11d042732

commit 3a5c0d2aba

16 changed files with 2601 additions and 7 deletions

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