⚡ Bolt: optimize matchUrl by caching pathCandidates and method upper-casing

[google-labs-jules]

💡 What: Lazily cache pathCandidates result within the matchUrl router loop, and compute method uppercase outside the loop.
🎯 Why: URL normalizations in pathCandidates loop up to 8 times running URL decoding and replacements. Doing this O(N) times inside the router loop causes severe degradation in performance when there are many configured routes.
📊 Impact: Reduces router execution time from O(N) string processing back to near O(1) by computing the normalizations only once per request.
🔬 Measurement: Run vitest on packages/jouska/test/unit/router.test.ts to verify the behavior remains completely intact and tests pass.

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PR created automatically by Jules for task 18054138350319212640 started by @YoungSx

[google-labs-jules]

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