feat(client): stage native multi-resolver foundation and adaptive selector#14

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nightowlnerd wants to merge 37 commits into

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feat/native-multi-resolver-v1

Commits on Feb 16, 2026

refactor(core): add state machine transition contracts
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feat(client): add resolver telemetry and switch reason taxonomy
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refactor(client): introduce resolver manager in parity mode
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feat(client): add adaptive single-active resolver selection
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fix(client): satisfy dead-code lint for switch reasons
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fix(client): preserve active resolver across reconnects
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fix(client): reconnect early on active path loss under load
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fix(client): avoid unnecessary reconnect when standby path is ready
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fix(client): throttle noisy resolver path failure logs
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fix(client): reduce noisy stream warnings during failover
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fix(client): derive mtu from dns codec payload limit
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fix(client): relax watchdog threshold during select phase
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fix(client): cap quic packet buffer to domain payload mtu
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test(server): accept tcp write channel closed in epipe e2e
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fix(client): avoid process abort on select-phase watchdog stalls
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fix(client): preserve mixed-mode polling on standby authoritative path
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fix(server): retry target connect on transient refusal
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fix(bench): wait for client ready before mixed transfer
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fix(bench): keep sink server alive across transient empty connects
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fix(client): never abort watchdog during select phase
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fix(client): abort after repeated select watchdog stalls
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refactor(client): extract runtime loop policies and reconnect decisions
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refactor(client): move poll query orchestration into runtime actions
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fix(client): place deadlock tests after runtime items
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fix(server): return noerror for delegated apex probes
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fix(client): rotate startup resolver after handshake stall
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Commits on Feb 17, 2026