ci: add timeout to Linux CI to prevent 2026.1 EAP snapshot resolution hangs

[aseemxs]

Problem

Linux (2026.1) CI runs for 6+ hours before being cancelled by the GitHub Actions timeout. Other versions (2025.2, 2025.3) finish in ~15-20 minutes.

Root Cause

The 2026.1 profile uses 261.22158-EAP-CANDIDATE-SNAPSHOT as the IDE SDK version. The -SNAPSHOT suffix causes Gradle to re-check the JetBrains snapshot repository on every build. When the repo is slow or the artifact is mid-publish, Gradle hangs indefinitely during dependency resolution — the ./gradlew check command never produces any output.

Evidence:

• CI logs show zero output from the Gradle test step — it hangs before compilation even starts
• 2025.2 and 2025.3 use stable release versions ("2025.3") that resolve instantly
• 2026.1 has never completed a CI run — every run hits the 6-hour GitHub Actions limit

Fix

Add timeout-minutes: 45 to the Linux unit tests workflow. This is a safety net so snapshot resolution hangs fail fast (45 min) instead of burning 6 hours of runner time. Normal test runs complete in ~15-20 minutes.

The SNAPSHOT version is kept intentionally so the build auto-picks up new EAP builds. If the timeout is consistently hit, we can pin to a specific build (e.g., 261.22158.205-EAP-CANDIDATE).

Testing

• 2025.2 and 2025.3 unaffected (finish well under 45 min)
• 2026.1 will either resolve and pass, or fail fast at 45 min instead of 6 hours

[github-actions]

Qodana for JVM

It seems all right 👌

No new problems were found according to the checks applied

💡 Qodana analysis was run in the pull request mode: only the changed files were checked

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