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2 Commits

Author SHA1 Message Date
hailin 8352578bd3 fix(conversation): add explicit varchar type for intentType column 
TypeORM requires explicit type for nullable string columns

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
 2026-01-23 08:30:03 -08:00
hailin 849a4a3099 feat(conversation): add token usage tracking for API cost analysis 
- Add TokenUsageEntity to store per-request token consumption
- Add TokenUsageService with cost calculation and statistics APIs
  - Record input/output/cache tokens per API call
  - Calculate estimated cost based on Claude pricing
  - Provide user/conversation/global stats aggregation
  - Support daily stats and top users ranking
- Integrate token tracking in ClaudeAgentService
  - Track latency, tool calls, response length
  - Accumulate tokens across tool loop iterations
- Add token_usages table to init-db.sql with proper indexes

This enables:
- Per-user token consumption tracking
- Cost analysis and optimization
- Future billing/quota features

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
 2026-01-23 08:23:58 -08:00