Fix: Escape MySQL wildcards (%) and (_) in search queries

[jeffersonsalvador]

Problem

When searching for values containing MySQL wildcards (% and _), these characters are interpreted as wildcard patterns rather than literal characters, resulting in incorrect query results.

Solution

• Added addcslashes() to escape % and _ in search terms before they are used in LIKE or ILIKE queries.
• Ensures these characters are treated as literals during the search process.

Testing

• Verified locally that searches with % or _ return accurate results without unintended wildcard behavior.
• Ensured no regression in existing query functionality.

Contribution

This change adheres to the PSR-2 coding standards and follows the contribution guidelines outlined in the repository.

Fixes #814