Update ao_commenter, ao_representative, and ao_requestor to use simple query string for exact match

[patphongs]

Summary

Modify the filtering behavior for ao_commenter, ao_representative, and ao_requestor to use the simple query string approach, similar to how case_respondents are handled. This change will allow users to pass an exact string match in quotes when desired while maintaining flexibility for partial matches.

Completion criteria

• Update the filtering logic for ao_commenter, ao_representative, and ao_requestor to use simple query string
• Ensure users can input exact matches by wrapping search terms in quotes.
• Maintain support for partial matches when quotes are not used.