Long jump and triple jump metrics and visualization

[rishikamtam12]

Summary

Closes #78

What changed:
Generated full long jump and triple jump metrics and stored in seed data and backend routes to frontend visualizations, KPI cards, and graph descriptions. Includes 6 total visualizations (3 per event) (3 KPI cards), and info tooltips on each chart.

Why:
Adds long jump and triple jump support to the StrideTrack metrics platform, enabling coaches to analyze approach profiles, phase ratios, contact time efficiency, and per foot GCT/flight time breakdowns for jump events.

Technical decisions worth noting:
A shared GraphInfoCard.tsx in charts handles the info icon tooltip across all charts in this ticket with descriptions kept in VisualizationsPage.tsx since the charts are page specific. Could do the descriptions in the individual card files as well makes more sense if charts are being used across multiple pages.

AI disclosure: Note what was AI-assisted vs. hand-written.
seed data, backend routes, chart components, KPI cards, and graph descriptions were AI assisted however all files were reviewed and adjusted to match team conventions.

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