v5.19.0

New Features

• FundShareholderReport data object for N-CSR/N-CSRS filings — parse fund shareholder reports into structured data
• EX-21 subsidiaries parser for 10-K filings — extract subsidiary lists from Exhibit 21
• Auditor property on CompanyReport — access auditor information directly from report objects
• Reports property on CompanyReport — access XBRL viewer pages from report objects
• to_facts_dataframe() on EarningsRelease and FinancialTable — convert earnings data to structured DataFrames

Bug Fixes

• Fix 8-K income statement classification failing for 56% of filings (#633)
• Fix XBRL statements label truncation when nested inside FortyF panel

Other

• README refresh: updated copy to emphasize breadth (20+ filing types) and simplicity