🎨 Palette: Add concrete examples to financial parameter tooltips

[aarjava]

💡 What: Added help tooltips with concrete examples (e.g., "10 bps = 0.10%") to statistical and financial parameters like ADV Participation %, Transaction Cost, and High Volatility Quantile.
🎯 Why: Users can find financial or statistical inputs ambiguous when only raw numerical values are used. Adding examples improves UX by confirming the expected format and meaning of the parameter.
📸 Before/After: Visual verification was performed with Playwright showing the tooltip rendering correctly on hover.
♿ Accessibility: Provides necessary context for screen readers and general users when interacting with complex numeric inputs.
📝 Journal: Added an entry detailing this learning to the .Jules/palette.md UX journal.

---

PR created automatically by Jules for task 4953500907443970373 started by @aarjava

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.