sim: start price adjustment logic for concentrated strategies

[zavelevsky]

Fixes: #180

feat(simulator): enhance start price adjustment logic for concentrated strategies

• Add concentration check to determine if price ranges are within 1% of each other
• For concentrated strategies: maintain existing market price-based start price adjustment
• For non-concentrated strategies: adjust start prices based on budget values
  • Set low_range_start_price to buyMin when portfolio_risk_value is 0
  • Set high_range_start_price to sellMax when portfolio_cash_value is 0