feat(adaptor): add '-xhigh' suffix to reasoning effort options

[Calcium-Ion]

Summary by CodeRabbit

• New Features
  • Added support for "-xhigh" model suffix recognition, enabling the system to handle new AI model variants with extended reasoning effort levels. The system now properly processes these model identifiers and extracts the appropriate configuration values.

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Walkthrough

The change extends the parseReasoningEffortFromModelSuffix function in OpenAI adaptor to recognize the "-xhigh" model suffix. When a model name ends with "-xhigh", the function now extracts "xhigh" as the effort level and returns the stripped model name alongside it.

Changes

Cohort / File(s)	Summary
Model suffix recognition relay/channel/openai/adaptor.go	Added "-xhigh" to effortSuffixes slice in parseReasoningEffortFromModelSuffix function to support extended reasoning effort level recognition

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• feat: sync gpt-5 model ratio and support new reasoning effort #1525: Introduced the parseReasoningEffortFromModelSuffix helper function and initial effort level suffix support; this PR extends it further with "-xhigh" recognition.

Poem

🐰 A suffix arrives, so bold and so bright,
"-xhigh" joins the fold, effort at height!
Little tweaks make the models align,
One more level of reasoning—simply divine! ✨

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding '-xhigh' suffix support to the parseReasoningEffortFromModelSuffix function in the adaptor.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/xhigh

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 147659f and 50854c1.

📒 Files selected for processing (1)

• relay/channel/openai/adaptor.go (1 hunks)

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