feat(client): add core single-active multi-resolver failover#15

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nightowlnerd wants to merge 21 commits into

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feat/multi-resolver-core

Commits on Feb 17, 2026

refactor(core): add state machine transition contracts
nightowlnerd
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feat(client): add resolver telemetry and switch reason taxonomy
nightowlnerd
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refactor(client): introduce resolver manager in parity mode
nightowlnerd
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feat(client): add adaptive single-active resolver selection
nightowlnerd
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fix(client): satisfy dead-code lint for switch reasons
nightowlnerd
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fix(client): preserve active resolver across reconnects
nightowlnerd
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fix(client): reconnect early on active path loss under load
nightowlnerd
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fix(client): avoid unnecessary reconnect when standby path is ready
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fix(client): rotate startup resolver after handshake stall
nightowlnerd
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fix(client): add explicit resolver reason for handshake stall
nightowlnerd
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fix(client): avoid synthetic startup path unique id
nightowlnerd
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fix(client): require confirmed active path delete before failover
nightowlnerd
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fix(client): move path tests below runtime helpers
nightowlnerd
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fix(client): gate failover on multi-signal resolver health
nightowlnerd
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fix(client): keep recursive standby paths inactive
nightowlnerd
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fix(client): preserve mixed-mode polling on standby authoritative path
nightowlnerd
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refactor(client): reconcile runtime helpers for minimal branch
nightowlnerd
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fix(client): harden watchdog against transient select stalls
nightowlnerd
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Commits on Feb 18, 2026