feat(observability): OTel instrumentation + HTTP idle-pool options#28

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bdchatham wants to merge 13 commits intomainfrom

feat/scale-idle-pool-with-workers

Commits on Apr 21, 2026

refactor(sender): configurable HTTP idle-conn pool with defaults 500/50

bdchatham
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claude
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sender: drop implicit worker-derived override, rely on 500/50 defaults
bdchatham
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feat(observability): OTel instrumentation for platform deployments

bdchatham
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claude
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observability: enable OpenMetrics + fix shutdown order + trim cardinality

bdchatham
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claude
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observability: drop bespoke OnceValue wrappers for idiomatic OTel

bdchatham
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claude
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observability: bump otelhttp v0.54.0 -> v0.68.0

bdchatham
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claude
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observability: trim comments, move invariants to README

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claude
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ci: bump Go to 1.25.1 + golangci-lint to v2.1.6
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ci: golang:1.25.1-bookworm (bullseye variant not published for Go 1.25)
bdchatham
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ci: golangci-lint-action @v7 (v6 doesn't support golangci-lint v2.x)
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ci: golangci-lint version latest (v2.1.6 still built on Go 1.24)
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lint: fix issues surfaced by golangci-lint v2
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Commits on Apr 22, 2026

review: address amir-deris feedback on PR #28

bdchatham
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claude
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