feat(SEO): update redirects

[myelinated-wackerow]

Summary

• Add whitepaper PDF redirect (308, no locale prefix) in next.config.js
• Add 31 new redirects for broken/moved pages
• Add se to deprecated locales in middleware
• Catch-all redirect for /roadmap/future-proofing/:path+ to handle mangled text-fragment URLs

Notes

• Whitepaper PDF redirect bypasses createRedirect helper to avoid locale prefix injection
• /%20wallets and %23-containing URL redirects use percent-encoded forms -- may need verification in staging

Test plan

• Verify whitepaper PDF redirect works without locale prefix
• Verify /%20wallets redirect resolves correctly
• Verify %23web-based-ides redirect resolves correctly
• Verify /roadmap/future-proofing/ catch-all works for mangled URLs

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Lighthouse	7 paths audited Performance: 61 (🟢 up 8 from production) Accessibility: 94 (🟢 up 1 from production) Best Practices: 100 (no change from production) SEO: 99 (no change from production) PWA: 59 (no change from production) View the detailed breakdown and full score reports

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