Create adopter group notification for critical webhook interpreter scaffolding fix

[Copilot]

This PR addresses the need to notify the Karmada adopter community about a critical bug fix in the webhook interpreter scaffolding code that was merged in PR #6603.

Background

PR #6603 fixed a severe issue in pkg/webhook/interpreter/http.go where the writeResourceInterpreterResponse method could cause infinite recursive calls leading to stack overflow and OOM crashes when HTTP connections fail (e.g., broken pipe errors). This bug could cause webhook interpreter processes to crash in production environments.

The Challenge

Unlike typical bug fixes that are automatically distributed through official binaries and container images, this fix affects scaffolding code located in examples/customresourceinterpreter/. Users who have built custom webhook interpreters based on this scaffolding code will not automatically receive this critical fix, as they maintain their own copies of the code.

Solution

This PR creates the necessary documentation and tooling to notify the adopter community:

1. Comprehensive Documentation (ADOPTER_GROUP_NOTIFICATION.md) - Explains the issue, impact, and required actions
2. Ready-to-Post Comment (comment_for_issue_6672.txt) - Contains the exact notification text for issue Backport 6603 #6672
3. Automation Script (post_adopter_notification.sh) - Provides a GitHub CLI script to post the notification
4. Clean Repository - Adds temporary files to .gitignore to maintain repository hygiene

Key Points for Adopters

• Critical Fix: Prevents infinite loops and OOM crashes in webhook interpreters
• Manual Action Required: No automatic distribution via official releases
• Files Affected: Custom implementations based on pkg/webhook/interpreter/http.go
• References: Links to PR Fix the issue of infinite loop caused by connection failure #6603 and related controller-runtime PR for full context

The notification specifically targets @karmada-io/karmada-adopter-group to ensure maximum visibility within the community that depends on webhook interpreter scaffolding.

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💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[karmada-bot]

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[RainbowMango]

/close

[karmada-bot]

@RainbowMango: Closed this PR.

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