🎨 Palette: Consistent number formatting for daily ledger

[EiJackGH]

💡 What:

Added thousands separators (:,.2f and :,.4f) to all numerical financial outputs in the simulate_trading daily ledger output, ensuring that prices, cash, and total portfolio values are easier to read.

🎯 Why:

Large, unbroken strings of numbers (e.g., 100000.00 vs 100,000.00) are difficult to parse visually and significantly increase cognitive load for users scanning CLI logs or simulation output.

📸 Before/After:

Before:
Day 10: Portfolio Value: $12000.50, Cash: $5000.00, BTC: 0.1400
🟢 Day 1: Buy 0.2000 BTC at $50000.00

After:
Day 10: Portfolio Value: $12,000.50, Cash: $5,000.00, BTC: 0.1400
🟢 Day 1: Buy 0.2000 BTC at $50,000.00

♿ Accessibility:

Cognitive accessibility improvement: By structuring the data with thousands separators, it reduces the mental effort required to decode and compare values, particularly for users with dyscalculia or cognitive impairments.

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PR created automatically by Jules for task 7704558688979285777 started by @EiJackGH

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