luulam bef54d5f12 fix: merge logUsage + saveUsageStats to prevent duplicate usage stats for streaming requests ...

- Enhanced saveUsageStats to include cache tokens (cache_read, cache_creation), reasoning tokens, and estimated flag
- Replaced logUsage calls in stream.js with saveUsageStats (2 locations)
- Removed duplicate saveUsageStats call from streamingHandler.js onStreamComplete
- Removed logUsage function and unused imports from usageTracking.js
- Each streaming request now writes exactly 1 usage record instead of 2

2026-06-19 08:43:10 +07:00

9.9 KiB

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