test: Phase 5 — integration tests, benchmarks, bufpool tests
- Integration: two-node localhost handshake + encrypted message exchange
+ controller ping/pong + UEPS packet routing via dispatcher + threat
circuit breaker + graceful shutdown (3 test functions)
- Benchmarks: 13 benchmarks across node/ and ueps/ — identity keygen,
ECDH shared secret, message serialise, SMSG encrypt/decrypt, HMAC
challenge sign/verify, KD-tree peer scoring, UEPS marshal/unmarshal,
bufpool throughput, challenge generation
- bufpool: 9 tests — get/put round-trip, buffer reuse, large buffer
eviction, concurrent access (race-safe), buffer independence,
MarshalJSON correctness + concurrency
Co-Authored-By: Virgil <virgil@lethean.io>
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