JAVA-126: Use .sdkmanrc as Java version source for CI

- Created .sdkmanrc file
- Updated setup-java action to v5.1.0
- Changed java-version parameter to java-version-file: .sdkmanrc

Follows: agent-migrations/2026-01-sdkmanrc-ci-java-version-technical-guide.md

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: lukaszgyg

.github/workflows/check.yml

@@ -19,10 +19,10 @@ jobs:
     steps:
       - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: Set up JDK
-        uses: actions/setup-java@0ab4596768b603586c0de567f2430c30f5b0d2b0 # v3.13.0
+        uses: actions/setup-java@f2beeb24e141e01a676f977032f5a29d81c9e27e # v5.1.0
         with:
           distribution: temurin
-          java-version: 21
+          java-version-file: .sdkmanrc
       - name: Validate Gradle wrapper
         uses: gradle/wrapper-validation-action@8d49e559aae34d3e0eb16cde532684bc9702762b # v1.0.6
       - name: Checkstyle

.github/workflows/publish.yml

@@ -17,10 +17,10 @@ jobs:
     steps:
       - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: Set up JDK
-        uses: actions/setup-java@0ab4596768b603586c0de567f2430c30f5b0d2b0 # v3.13.0
+        uses: actions/setup-java@f2beeb24e141e01a676f977032f5a29d81c9e27e # v5.1.0
         with:
           distribution: temurin
-          java-version: 21
+          java-version-file: .sdkmanrc
       - name: Validate Gradle wrapper
         uses: gradle/wrapper-validation-action@8d49e559aae34d3e0eb16cde532684bc9702762b # v1.0.6
       - name: Build sourcesJar and javadocJar

.github/workflows/repository-maintenance.yml

@@ -22,11 +22,11 @@ jobs:
     steps:
       - name: Checkout sources
         uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
-      - uses: actions/setup-java@b36c23c0d998641eff861008f374ee103c25ac73 # v4.4.0
+      - uses: actions/setup-java@f2beeb24e141e01a676f977032f5a29d81c9e27e # v5.1.0
         name: Setup Java
         with:
           distribution: temurin
-          java-version: 21
+          java-version-file: .sdkmanrc
       - name: Generate and submit dependency graph
         uses: gradle/actions/dependency-submission@v4.1.0
         with:

.sdkmanrc

@@ -0,0 +1 @@
+java=21.0.5-tem