⚡ Bolt: [performance improvement] Cache FAQ YAML loading

[alinelena]

💡 What: Extracted yaml.safe_load(f) into a separate function _load_faqs() decorated with @functools.cache. Replaced the direct file read in build_faqs with a call to _load_faqs(), followed by copy.deepcopy() to prevent unintended mutations of the cached data.
🎯 Why: build_faqs runs every time the FAQ component is rendered. Reading and parsing faqs.yml on every invocation is an unnecessary source of disk I/O and parsing overhead for static data.
📊 Impact: Eliminates repeated I/O operations and yaml.safe_load calls, significantly speeding up the generation of the FAQ component while remaining safe via a defensive deep copy.
🔬 Measurement: Verified with the test suite that component building functionality operates correctly, and linting confirms the patch is stylistically sound.

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PR created automatically by Jules for task 18433256623000223384 started by @alinelena

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