Switch Spring integration workflow from Maven to Bazel

[Copilot]

Spring integration CI was still using Maven, diverging from the repository’s Bazel-based build/test path. This updates the spring GitHub Actions workflow to run Spring + Spring AOT integration builds/tests via Bazel targets.

• Workflow execution model

  • Replaced Maven test invocation with Bazel build/test steps scoped to Spring integration targets.
  • Added Bazel dependency pinning step (@maven//:pin) to keep external resolution aligned with MODULE.bazel.

• Runner/tooling setup

  • Added Bazelisk installation in the workflow job.
  • Set BAZELISK_SKIP_VERSION_CHECK=1 in job env for consistent CI execution.

• Caching strategy

  • Replaced Maven local-repo cache with Bazel disk/repository cache paths.
  • Updated cache keys to track Bazel-relevant inputs (MODULE.bazel, .bazelversion, maven_install.json) and Java matrix version.

- name: Build Spring integrations with Bazel
  run: >-
    bazel build --config=ci
    //spring:client-java-spring-integration
    //spring-aot:client-java-spring-aot-integration

- name: Test Spring integrations with Bazel
  run: >-
    bazel test --config=ci
    //spring:tests

[brendandburns]

@copilot modify the cache key so it is the same as other CI/CD so that it re-uses builds from the main build/test runs.

[Copilot]

@copilot modify the cache key so it is the same as other CI/CD so that it re-uses builds from the main build/test runs.

Updated in 6c67e4b: the Spring workflow cache key and restore-key prefix now match the main Bazel CI format (bazel-${{ runner.os }}-java${{ matrix.java }}-...) so it can reuse the same cache entries.

[brendandburns]

@copilot since bazel is building jars, can we cache them across OS versions?

[Copilot]

@copilot since bazel is building jars, can we cache them across OS versions?

Implemented in 7c5212f: Spring workflow now uses a separate cross-OS cache for Bazel repository downloads (~/.cache/bazel/cache/repos/v1, enableCrossOsArchive: true) while keeping the Bazel disk action cache OS-scoped for safety/reuse with main CI.

[brendandburns]

@copilot update the main CI to cache across OS also.

[Copilot]

@copilot update the main CI to cache across OS also.

Implemented in 94f531e: main bazel.yml now also uses split caching with a cross-OS repository cache (~/.cache/bazel/cache/repos/v1, enableCrossOsArchive: true) and keeps the Bazel disk cache OS-scoped.

[brendandburns]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: brendandburns, Copilot

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