Update backtesting

[sweetpea22]

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[sweetpea22]

Summary

• Replaces the outdated local-workflow backtesting page with a platform-focused guide for reviewing automatic release backtests.
• Documents the 20,000-block historical review, matched transactions, incident payloads, previous transactions, and next steps for tuning assertions.
• Adds a dedicated release-review reference covering assertion verification, submitted source verification, and backtesting.
• Updates the Apply, Deploy, Projects, Testing Strategy, and Troubleshooting pages to use the current Releases workflow and valid links.
• Adds the three new MetaMorpho backtesting screenshots with captions and alt text.

The previous page primarily described manual Foundry backtesting, while the current product presents backtesting as an automatic pre-release platform check. The revised structure keeps platform review guidance separate from the local replay API reference.

Validation

• pnpm validate
• pnpm broken-links
• pnpm a11y
• git diff --check

All checks passed.