Bump version to v4.0.0-beta.14

[ss1909]

What's Changed

🐛 Fixed

• Pipeline upload: look for secrets within trigger step build.env by @DrJosh9000 in Pipeline upload: look for secrets within trigger step build.env #4116
• Emit git.remote_mirror.duration_ms as a numeric span attribute by @lox in Emit git.remote_mirror.duration_ms as a numeric span attribute #4192
• Fix pre-exit cancellation test timing flake by @lox in Fix pre-exit cancellation test timing flake #4203
• Fix shell cancellation test synchronization by @lox in Fix shell cancellation test synchronization #4204
• Downgrade Go 1.26.5 -> 1.25.12 to fix Windows exit-status flake by @lox in Downgrade Go 1.26.5 -> 1.25.12 to fix Windows exit-status flake #4208
• Quiet down logs for assigning priority to agents by @moskyb in Quiet down logs for assigning priority to agents #4191

🔧 Changed

• feat(cache): namespace archive entries by anchor via a manifest by @ss1909 in feat(cache): namespace archive entries by anchor via a manifest #4120
• Log when a custom endpoint is used by @moskyb in Log when a custom endpoint is used #4215

🏠 Internal

• A-1494: Verify cache checksum on restore by @zhming0 in A-1494: Verify cache checksum on restore #4187
• Remove tracetools.AddAttributes; use typed span attributes by @lox in Remove tracetools.AddAttributes; use typed span attributes #4194
• Parallelize end-to-end tests by @lox in Parallelize end-to-end tests #4209

Full Changelog: v4.0.0-beta.13...v4.0.0-beta.14