Add Cosmos client-side observability layer#4789

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NaluTripician:nalutripician/cosmos-observability

Commits on Jul 16, 2026

Add DiagnosticsHandler chain to Cosmos SDK (WS2)

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Bound Cosmos diagnostics under retry storms

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Add OpenTelemetry metrics handler for Cosmos (WS3)

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Add Cosmos tail-sampled tracing and sampling log

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Merge remote-tracking branch 'upstream/main' into nalutripician/cosmos-observability
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Merge remote-tracking branch 'origin/nalutripician/cosmos-obs-ws6-bounding' into nalutripician/cosmos-observability
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Merge remote-tracking branch 'origin/nalutripician/cosmos-obs-ws3-metrics' into nalutripician/cosmos-observability
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Merge WS3 metrics, WS45 emission, WS6 bounding into observability

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Wire op-scope context to diagnostics handlers (WS8)

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Fold corrected Cosmos diagnostics contract doc into PR-OBS

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Address review comments on Cosmos observability

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Commits on Jul 17, 2026

Commits on Jul 21, 2026