## Flee Threshold Changes
- Reduced flee threshold from AttackRadius2+4 to AttackRadius2 (no buffer)
- Modified bots: farmer, gatherer, siege
- Bots now only consider enemies in actual attack range, not preemptively
- Added outnumber logic: only flee when nearbyAllies < nearbyEnemies
## Behavior Vector Changes
- Derive aggression from actual kill rate (not self-reported)
- Formula: behaviorVec[0] = min(killRate, 1.0)
- Preserves existing economy value or defaults to 0.5
- Enhanced logging to show derived aggression value
## Rationale
Aggression must be economically necessary, not just rewarded.
Previous flee logic created a false safe option that discouraged combat.
Now bots only flee when actually outnumbered within combat range.
Related: bf-413 genesis bead tracking mechanics iteration
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