Dedupe job titles: drop parentheses only for season/year/place

When building a company+title key to stop duplicate job applications, stripping all parenthesized text merges distinct roles like 'SDE Intern (Embedded Systems)' with 'SDE Intern (Summer 2027)'. Strip a parenthetical only when it contains a year, season, remote/hybrid, or a ', XX' state code; keep team names. Also normalize internship->intern and engineering->engineer and sort tokens so word order and 'Intern, X' vs 'X Intern' match. Run the new key over your real historical data and list pairs that match only by the new key before shipping: that is how the false merges showed up.