Replaces the previous AI-category based topic analysis with a word-based
frequency analysis using a Common Table Expression (CTE).
- Implements `word_list` CTE to split message content into individual words.
- Adds regex filtering to exclude URLs, Discord stickers, and emojis.
- Implements a stop-word filter to remove common Indonesian and English
conjunctions, pronouns, and prepositions.
- Filters out words shorter than 3 characters.
- Updates the aggregation to group by word and limit results to the top 10.