Adds Cash Flow Statement, Executive Summary, Tax Summary, and Annual
Statements as fusion.report records with line_specs. All work with the
existing engine's bucket-sum pattern — no engine changes needed.
Westin total: 4 + 4 = 8 of Enterprise's 22 standard reports now in
fusion_accounting_reports. Partner-grouped reports (Aged AR/AP,
Partner Ledger) need an engine extension — in commit 2.
Made-with: Cursor
