🎨 Palette: Add concrete examples to financial parameter tooltips

[aarjava]

💡 What: Added concrete numerical examples to the tooltips for financial inputs (vol_q_high and bt_cost) in the Streamlit dashboard sidebar. Documented the learning in .Jules/palette.md.
🎯 Why: To improve clarity and usability for users when configuring abstract financial/statistical parameters like basis points and quantiles. Abstract parameters can be confusing, but concrete examples like "10 bps = 0.10%" make them instantly clear.
📸 Before/After: Tooltips added via Streamlit help kwarg. Verified visually with Playwright.
♿ Accessibility: Enhances cognitive accessibility by explicitly defining unit conversions and thresholds.

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PR created automatically by Jules for task 17726612249838055852 started by @aarjava

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