refactor(otel): remove unused SendCCSessionEnd function and types

[AnnatarHe]

Summary

• Remove unused SendCCSessionEnd function from model/api_ccotel.go
• Remove unused CCSessionEndRequest and CCSessionEndResponse types from model/ccotel_types.go

Test plan

• Verified go build ./... succeeds

🤖 Generated with Claude Code

[gemini-code-assist]

Summary of Changes

Hello @AnnatarHe, 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 focuses on code hygiene by removing unused functions and type definitions related to OpenTelemetry session ending. This refactoring effort aims to reduce technical debt, improve code readability, and simplify the codebase by eliminating dead code that no longer serves a purpose.

Highlights

• Code Removal: The SendCCSessionEnd function, previously located in model/api_ccotel.go, has been entirely removed as it was identified as unused.
• Type Definition Cleanup: The CCSessionEndRequest and CCSessionEndResponse type definitions, found in model/ccotel_types.go, have been removed due to their lack of usage within the codebase.

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[gemini-code-assist]

Code Review

This pull request removes the unused SendCCSessionEnd function from model/api_ccotel.go and the associated CCSessionEndRequest and CCSessionEndResponse types from model/ccotel_types.go. This is a good refactoring that improves code maintainability by removing dead code. The changes are clean and I found no issues. Great work on keeping the codebase tidy.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 11 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
daemon/ccotel_processor.go	0.00%	11 Missing ⚠️

Flag	Coverage Δ
unittests	20.95% <0.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
model/api_ccotel.go	0.00% <ø> (ø)
daemon/ccotel_processor.go	0.00% <0.00%> (ø)

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