Upgrade Temporal SDK flow header handling

[longquanzheng]

Summary

• upgrade every Dex Go workspace module to Temporal SDK fork v1.47.1-superdurable.3
• omit inherited Dex flow type headers for Step and RPC activities that register a FlowTypeProvider
• retain inherited headers for SubFlow and system activities without that provider

Upstream SDK change: superdurable/temporal-sdk-go#2

Published release: https://github.com/superdurable/temporal-sdk-go/releases/tag/v1.47.1-superdurable.3

Why

Step and RPC activity inputs already contain the Flow type. Persisting the same value in __temporal_sdk_dex_flow_type duplicates data in Temporal history. The new SDK treats a registered FlowTypeProvider as authoritative while preserving legacy header consumption and inheritance for activities without that provider.

Validation

• make -C server unitTests
• make -C server temporalIntegTests integrationCoverageArgs="-run=^TestTemporalMetrics -temporalHostPort=127.0.0.1:7234" against an isolated Temporal dev server
• GOWORK=off go mod tidy -diff for server, server/cmd/server, cli, and protos/codec-server
• make -C sdk-go docsCheck
• GOWORK=off go test ./... in protos/codec-server
• upstream SDK check, unit, replay, and focused integration tests with default cache and WORKFLOW_CACHE_SIZE=0
• full GitHub CI matrix

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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