Co-Authored-By: Codex <noreply@anthropic.com>

Add .agents/ to .gitignore and untrack skill files.

Revert .gitignore exceptions that accidentally tracked web/dist build
artifacts. The directory should never be committed.

This PR fixes three issues:
1. Token bound_channel_id not updating: Add bound field to Update() method
2. Channel pricing quota_type detection: Use QuotaTypeByCall constant instead of magic number 1
3. Log display for ratio-based pricing: Set ModelPrice=-1 for ratio-based pricing

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

- 批量查询和插入，减少数据库操作
- 统一错误处理

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>