⚡ Bolt: Optimize news item sorting and extraction

[toreleon]

💡 What:

• Implemented the Schwartzian Transform to cache parsed dates (parseCafefDate) before sorting news items.
• Replaced the chained .slice(0, limit).map(shapeItem) array operations with a single bounded for loop, constructing the final array directly.

🎯 Why:

• The original code called parseCafefDate()—which performs regex matching (/\/Date\((\d+)\)\//.exec()) and Date object allocations—inside the .sort() comparator. This caused these expensive operations to run $O(N \log N)$ times, creating unnecessary CPU overhead and garbage collection pressure, particularly when merging many articles from different categories.
• The .slice().map() chain allocated two intermediate arrays, which also contributed to memory allocation overhead.

📊 Impact:

• Date parsing overhead is reduced from $O(N \log N)$ to exactly $O(N)$.
• Array allocations are reduced by avoiding intermediate .slice() and .map() results.
• Overall faster execution time and reduced memory usage during news aggregation.

🔬 Measurement:

• The optimization can be verified by running the test suite (pnpm test) which confirms that no functionality is broken, and by profiling the CPU usage of the newsTool with large limits.

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PR created automatically by Jules for task 4312104046449447061 started by @toreleon

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