Feat: Promote ControllerPriorityQueue to beta

[zach593]

What type of PR is this?
/kind feature

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What this PR does / why we need it:

This PR promotes the ControllerPriorityQueue feature gate to beta and enables it by default. The feature has been validated through sufficient testing and real-world usage, and is now considered stable for broader adoption.

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Which issue(s) this PR fixes:

Fixes #

Part of #7072

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Special notes for your reviewer:

The feature has been exercised in production environments and has demonstrated stability and performance benefits. No behavioral changes are introduced other than enabling it by default.

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Does this PR introduce a user-facing change?:

karmada-controller-manager, karmada-agent: `ControllerPriorityQueue` is promoted to beta and enabled by default.

[karmada-bot]

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[gemini-code-assist]

Summary of Changes

Hello @zach593, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request advances the ControllerPriorityQueue feature gate to beta status and activates it by default. This promotion signifies the feature's maturity and stability, having undergone sufficient testing and real-world validation. The change aims to make this performance-enhancing feature more accessible to users without introducing any behavioral modifications beyond its default enablement.

Highlights

• Feature Gate Promotion: The ControllerPriorityQueue feature gate has been promoted from alpha to beta, indicating its maturity and stability.
• Default Enablement: The ControllerPriorityQueue feature is now enabled by default, making its benefits accessible without manual configuration.
• Version Update: The associated version for the ControllerPriorityQueue feature gate has been updated from v1.15 to v1.17 to reflect its new beta status.

Changelog

• pkg/features/features.go
  • Updated the ControllerPriorityQueue feature gate's stability level from alpha: v1.15 to beta: v1.17.
  • Changed the default enablement of ControllerPriorityQueue from false to true and its PreRelease status from featuregate.Alpha to featuregate.Beta.

Activity

• The pull request was created by zach593.
• The ControllerPriorityQueue feature gate is promoted to beta.
• The feature is now enabled by default.

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[gemini-code-assist]

Code Review

This pull request promotes the ControllerPriorityQueue feature gate to beta and enables it by default. The changes in pkg/features/features.go correctly update the feature gate's status from alpha to beta and set its default value to true. The changes are straightforward, correct, and align with the goal of the pull request. The code looks good.

[Copilot]

Pull request overview

This PR promotes the ControllerPriorityQueue feature gate from alpha (introduced in v1.15) to beta status in v1.17, enabling it by default. The feature allows controllers to prioritize processing recent cluster changes first during startup, reducing perceived backlog and improving responsiveness, though it may increase overall reconciliation frequency. This promotion is part of the broader performance optimization initiative tracked in issue #7072.

Changes:

• Updated feature gate status from alpha to beta with default enabled
• Updated version tracking comment from v1.15 to v1.17
• Changed feature gate configuration to enable by default

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 42.04%. Comparing base (bcff69b) to head (9398615).
⚠️ Report is 2 commits behind head on master.
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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7200      +/-   ##
==========================================
+ Coverage   42.00%   42.04%   +0.04%     
==========================================
  Files         874      874              
  Lines       53448    53454       +6     
==========================================
+ Hits        22450    22476      +26     
+ Misses      29303    29291      -12     
+ Partials     1695     1687       -8     

Flag	Coverage Δ
unittests	42.04% <ø> (+0.04%)	⬆️

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