fix: update logging reduction with actual measurement

16k tokens → 6.7k tokens (58% reduction, not 80% as estimated)

CHANGELOG.md

@@ -30,7 +30,7 @@
 - Removed "logs/" from prohibited folders list
 - Updated folder purposes table with log/ entry
 
-**Result:** 16k tokens → ~2-3k tokens (estimated 80% reduction)
+**Result:** 16k tokens → ~6.7k tokens (58% reduction)
 
 **Standard Structure:**
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