[mperor]

• Gradle toolchain instead of sourceCompatibility/targetCompatibility: Gradle now picks JDK 25 regardless of the java on PATH (previously a JDK 21 default failed with invalid source release: 25). Added foojay-resolver-convention so a missing JDK is downloaded automatically.
• JUnit 5.11.3 → 6.1.3 (BOM). All tests pass without changes.
• CI also publishes Common test results (it was the only module missing from the list).
• .gitattributes: text=auto with explicit eol=lf for gradlew and eol=crlf for *.bat; test resources under JavaReleases/src/test/resources are marked -text so encoding fixtures stay byte-for-byte intact. The index was already all LF, so renormalization changed no files.
• .gitignore: /HelloWorld.class never matched (the Java6 test runs in JavaReleases/) — now ignores both HelloWorld.java and .class leftovers there.

[github-actions]

Test Results

260 tests  +2   257 ✅ +2   6s ⏱️ -1s
 78 suites +1     3 💤 ±0 
 78 files   +1     0 ❌ ±0 

Results for commit f22664c. ± Comparison against base commit 1b151e0.

This pull request skips 1 and un-skips 1 tests.

pl.mperor.lab.java.design.pattern.creational.singleton.SingletonTest ‑ testThreadSafe()

pl.mperor.lab.java.design.pattern.creational.singleton.SingletonTest ‑ testLazyInitialized()