Extended ticket search (contacts + tickets)

Searches contacts and tickets in parallel and returns two buckets: sessionResults (tickets belonging to matching contacts, with their latest comment) and generalResults. Each bucket is capped at 250 tickets.

Query parameters: searchTerm (required), type (match mode: STRICT by default, or BROAD; note this is NOT the ticket type here), ticketType (optional ticket type filter; by default CRASH, SURVEY and BOT tickets are excluded), ticketStatus (optional status filter), addSession (set to true to include contact data).