Fix tsquery syntax error in VectorSearchTool
Created by: google-labs-jules[bot]
This commit fixes a bug in the VectorSearchTool that caused a psycopg2.errors.SyntaxError when the search query contained special characters or multiple spaces. The fix sanitizes the search query by using a regular expression to extract only alphanumeric words, ensuring that the tsquery is always well-formed.
PR created automatically by Jules for task 17441640140111665000 started by @Edouard-Legoupil