Function validate_search_query 

pub fn validate_search_query<'a>(
    query: &'a str,
    config: Option<&ValidationConfig>,
) -> Result<&'a str>

What: Validate a search query string.

Inputs:

• query: Search query to validate
• config: Optional validation configuration (uses defaults if None)

Output:

• Result<&str> containing the trimmed query, or an error

Details:

• Trims whitespace from the query
• In strict mode, empty queries after trimming return an error
• In lenient mode, empty queries are allowed
• Checks maximum length (default: 256 characters)
• Any characters are allowed (will be percent-encoded)

Errors

• Returns Err(ArchToolkitError::EmptyInput) if query is empty after trimming and strict mode is enabled
• Returns Err(ArchToolkitError::InputTooLong) if query exceeds maximum length