⚡ Bolt: Memoize filtered resources in Documentaries

[belpythons]

What

• Extracted categories and externalResources arrays outside of the Documentaries component scope.
• Wrapped the filteredResources array derivation in a useMemo hook, adding searchTerm and selectedCategory as dependencies.

Why

• Defining static arrays inside the component function causes them to be re-created in memory on every render.
• Deriving filteredResources without memoization causes the filtering logic to run unnecessarily on any unrelated re-renders.

Impact

• Reduces memory allocations during re-renders by persisting the static arrays.
• Prevents expensive string matching and array recalculation unless the search term or selected category actually changes.

Measurement

• Verified functionality locally using the development server and ensured it builds and lints successfully.

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PR created automatically by Jules for task 7549205174506779927 started by @belpythons

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