chore(github): emit event when API rate limit exceeded

[theakshaypant]

📝 Description of the Change

Add Kubernetes event emission via EmitMessage when GitHub API rate limit remaining hits zero. This surfaces rate limit exhaustion as a Repository event, improving observability for operators.

🔗 Linked GitHub Issue

N/A

🧪 Testing Strategy

• Unit tests
• Integration tests
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• Manual testing
• Not Applicable

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[gemini-code-assist]

Code Review

This pull request adds a check for exhausted GitHub API rate limits, logging an error and emitting an event when the limit is reached. Feedback identified a potential nil pointer dereference on the event emitter, which could cause a panic if the provider is not fully initialized.

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Codecov Report

❌ Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.22%. Comparing base (eda5331) to head (101db16).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/provider/github/profiler.go	0.00%	7 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2715      +/-   ##
==========================================
- Coverage   59.24%   59.22%   -0.03%     
==========================================
  Files         208      208              
  Lines       20566    20573       +7     
==========================================
  Hits        12184    12184              
- Misses       7610     7617       +7     
  Partials      772      772              

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[mathur07]

/lgtm