ids_to_codes: Determine internal codes from IDs titles
Description
This internal function converts IDs tiles into their corresponding
internal codes (e.g., "IMMH", "PAMH").
It matches based on predefined keyword patterns and chooses the most
specific code when multiple patterns match.
Usage
ids_to_codes(x)
Value
character vector of internal codes corresponding to each input IDs titles.
Returns NA if no pattern matches.