upstream: one absolute per-query budget across queueing and failover

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waiting for a slot now spends the query budget; truncated attempts that
expire fault the budget, not the upstream, and are never attributed.
admission sweeps in priority order before blocking. forward zones spend
read_timeout_ms once across udp, truncation and tcp. adds
nxdns_upstream_budget_exhausted_total and a 64-upstream validation limit.

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mokhtar

2026-08-27 21:10:43 +02:00

parent 6170571d23

commit 72cdbbd113

16 changed files with 1598 additions and 207 deletions

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src/upstream/pool.zig

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