feat(tools): add get_token_usage to agent

[zhijianma]

Description

[Describe what this PR does and why]

Related Issue: Fixes #(issue_number) or Relates to #(issue_number)

Security Considerations: [If applicable, e.g. channel auth, env/config handling]

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation
• Refactoring

Component(s) Affected

• Core / Backend (app, agents, config, providers, utils, local_models)
• Console (frontend web UI)
• Channels (DingTalk, Feishu, QQ, Discord, iMessage, etc.)
• Skills
• CLI
• Documentation (website)
• Tests
• CI/CD
• Scripts / Deploy

Checklist

• I ran pre-commit run --all-files locally and it passes
• If pre-commit auto-fixed files, I committed those changes and reran checks
• I ran tests locally (pytest or as relevant) and they pass
• Documentation updated (if needed)
• Ready for review

Testing

[How to test these changes]

Local Verification Evidence

pre-commit run --all-files
# paste summary result

pytest
# paste summary result

Additional Notes

[Optional: any other context]

[gemini-code-assist]

Summary of Changes

Hello, 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 refactors the get_token_usage function to improve code clarity and consistency. The primary change involves updating how token usage summary data is accessed, transitioning from dictionary-style key lookups to direct attribute access. This modification streamlines the code, making it easier to read and understand the data flow within the token usage reporting mechanism.

Highlights

• Refactoring Token Usage Access: The get_token_usage function has been refactored to access properties of the summary object using dot notation (e.g., summary.total_prompt_tokens) instead of dictionary-style key access (e.g., summary['total_prompt_tokens']).
• Improved Readability: This change enhances the readability and maintainability of the token usage reporting logic by using object attributes, which is generally preferred for structured data.

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Changelog

• src/copaw/agents/tools/get_token_usage.py
  • Updated data access for the summary object from dictionary keys to object attributes.

Activity

• No specific activity (comments, reviews, progress) has been recorded for this pull request yet.

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[gemini-code-assist]

Code Review

The pull request refactors the get_token_usage function to use attribute-style access (e.g., summary.key instead of summary["key"]) for summary and stats objects, improving code readability and consistency. The reviewer suggests an improvement opportunity to further enhance readability by combining adjacent f-strings in two places within the function.