2.56.0

Various fixes & improvements

• feat: auto-fetch head-ref from GitHub Actions in detached HEAD state (#2805) by @runningcode
• feat: automatically fetch base SHA in GitHub Actions PR workflows (#2799) by @runningcode
• feat(preprod): use deflated compression when creating the zip file (#2800) by @trevor-e
• feat(preprod): make sure at least one app bundle is present for upload (#2795) by @trevor-e
• feat(preprod): fail upload if app is missing Info.plist (#2793) by @trevor-e
• feat: restore GitHub Actions base branch detection (#2792) by @runningcode
• fix: lower log level for missing base ref detection (EME-369) (#2813) by @runningcode
• fix: simplify debug logging for PR number detection (EME-362) (#2812) by @runningcode
• fix: serialize VCS tests to prevent race conditions (EME-368) (#2811) by @runningcode
• fix: Validate SENTRY_RELEASE environment variable (#2807) by @szokeasaurusrex
• fix: use actual PR head SHA in GitHub Actions instead of merge commit (#2785) by @runningcode
• fix: suppress warning messages in failing build upload tests (#2791) by @runningcode