New endpoints

/v1/historical-dilution — point-in-time dilution snapshots. Filter by exact date or a date_from/date_to range.
/v1/historical-tickers — given a ticker, returns it plus all historical tickers with their change dates (case-insensitive).

New filters & fields

/v1/news, /v1/news-basic, /v1/filing-titles: new form_type filter (comma-separated, e.g. form_type=8-K,10-Q). On /v1/filing-titles this replaces the previous single-value match.
/v1/news, /v1/news-basic: new tags filter, new include_summary param, new headline field in responses.
/v1/registrations: type=ATM now supported; F-3ASR added to shelf form types.
/v1/screener: response now includes companyname.