[Lacikika]

💡 What: Moved fs.readFileSync out of the moderation event handler for messageCreate and introduced a global cache badWordsCache. Also optimized it to pre-compute the lowercased versions of the words rather than calling .toLowerCase() in every check loop.
🎯 Why: The previous code synchronously loaded and parsed badwords.json on every single message event, causing significant CPU blocking and disk I/O on active servers.
📊 Measured Improvement: In a benchmark using 1000 items in badwords.json and 1000 events, execution time went from 435ms down to 330ms (a ~25% decrease in overall event processing time overhead).

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PR created automatically by Jules for task 11927522952074606270 started by @Lacikika

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