fix: create reusable setup-go action to fix Go module cache in CI workflows

[Copilot]

Most CI workflows were using actions/setup-go without cache-dependency-path, causing the action to scan for all **/go.sum files in the repo. This produces an inconsistent cache key, leading to frequent cache misses and modules being re-downloaded on every run.

Changes

• Created a reusable composite action .github/actions/setup-go/action.yml that wraps actions/setup-go and always passes both ./go.sum and ./internal/tools/go.sum as cache-dependency-path:

- uses: actions/setup-go@...
  with:
    go-version: ${{ inputs.go-version }}
    cache-dependency-path: |
      ./go.sum
      ./internal/tools/go.sum

• Updated all 21 CI workflow files to use ./.github/actions/setup-go instead of calling actions/setup-go directly

The check-go-version.sh lint script continues to work correctly since workflow files retain go-version: 1.26.x in their with: sections. The setup-go-tip action is intentionally excluded — that workflow explicitly purges the module cache immediately after setup.

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[yurishkuro]

instead of add

[Copilot]

Pull request overview

This PR improves CI reliability and performance by standardizing Go toolchain setup and module caching across workflows, preventing inconsistent cache keys caused by repo-wide **/go.sum scanning.

Changes:

• Added a reusable composite action .github/actions/setup-go that wraps actions/setup-go and pins cache-dependency-path to ./go.sum and ./internal/tools/go.sum.
• Updated CI workflows to use the new local ./.github/actions/setup-go action instead of calling actions/setup-go directly.
• Removed per-workflow cache-dependency-path duplication where it existed.

Reviewed changes

Copilot reviewed 22 out of 22 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
.github/workflows/fossa.yml	Switches Go setup to the reusable local setup-go action.
.github/workflows/codeql.yml	Uses reusable setup-go for Go language runs to stabilize caching.
.github/workflows/ci-unit-tests.yml	Replaces direct setup-go + per-workflow cache path with the reusable action.
.github/workflows/ci-summary-report.yml	Uses reusable setup-go for coverage tooling setup with consistent cache keying.
.github/workflows/ci-release.yml	Uses reusable setup-go in release workflow to standardize caching.
.github/workflows/ci-lint-checks.yaml	Replaces direct setup-go in multiple jobs with reusable setup-go.
.github/workflows/ci-e2e-tailsampling.yml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-e2e-spm.yml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-e2e-query.yml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-e2e-opensearch.yml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-e2e-memory.yaml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-e2e-kafka.yml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-e2e-grpc.yml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-e2e-elasticsearch.yml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-e2e-clickhouse.yml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-e2e-cassandra.yml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-e2e-badger.yaml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-docker-hotrod.yml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-docker-build.yml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-docker-all-in-one.yml	Switches to reusable setup-go for consistent Go caching.
.github/workflows/ci-build-binaries.yml	Switches to reusable setup-go for consistent Go caching.
.github/actions/setup-go/action.yml	New composite action encapsulating Go setup with stable cache dependency paths.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.67%. Comparing base (253ac90) to head (1e23089).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8257      +/-   ##
==========================================
+ Coverage   95.65%   95.67%   +0.02%     
==========================================
  Files         318      318              
  Lines       16804    16804              
==========================================
+ Hits        16074    16078       +4     
+ Misses        577      574       -3     
+ Partials      153      152       -1     

Flag	Coverage Δ
badger_direct	9.06% <ø> (ø)
badger_e2e	1.04% <ø> (ø)
cassandra-4.x-direct-manual	13.25% <ø> (ø)
cassandra-4.x-e2e-auto	1.03% <ø> (ø)
cassandra-4.x-e2e-manual	1.03% <ø> (ø)
cassandra-5.x-direct-manual	13.25% <ø> (ø)
cassandra-5.x-e2e-auto	1.03% <ø> (ø)
cassandra-5.x-e2e-manual	1.03% <ø> (ø)
clickhouse	1.16% <ø> (ø)
elasticsearch-6.x-direct	16.84% <ø> (ø)
elasticsearch-7.x-direct	16.87% <ø> (ø)
elasticsearch-8.x-direct	17.02% <ø> (ø)
elasticsearch-8.x-e2e	1.04% <ø> (ø)
elasticsearch-9.x-e2e	1.04% <ø> (ø)
grpc_direct	7.79% <ø> (ø)
grpc_e2e	1.04% <ø> (ø)
kafka-3.x-v2	1.04% <ø> (ø)
memory_v2	1.04% <ø> (ø)
opensearch-1.x-direct	16.91% <ø> (ø)
opensearch-2.x-direct	16.91% <ø> (ø)
opensearch-2.x-e2e	1.04% <ø> (ø)
opensearch-3.x-e2e	1.04% <ø> (ø)
query	1.04% <ø> (ø)
tailsampling-processor	0.52% <ø> (ø)
unittests	94.37% <ø> (+0.02%)	⬆️

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