Adds the NEWS entry, a Financial data pkgdown reference section (none
existed for cog_spending/cog_revenue), and corrects CLAUDE.md's SQL-layer
claim, view count, test count and fixture-year description against
measured values. Also documents balance_caveats in
inst/schemas/provenance-v1.json (test-first: added a schema-documentation
test to test-balances.R, confirmed it failed, then fixed the schema) and
fleshes out cog_balances()'s @return roxygen to enumerate its conditional
columns, regenerating man/cog_balances.Rd.
Mirrors R/spending.R:465-466 -- .check_govids_in_scope()'s return was
previously captured only for its message side effect. Also drops a
redundant duplicate assertion in the flow-code guard test.
The bundled fixture has no balance item_code with is_aggregate = TRUE, so
asserting COUNT(*) FROM balance_long WHERE is_aggregate = 0 passed whether
or not the view's AND NOT is_aggregate predicate existed. Follows the
synthetic hive-partitioned parquet pattern already used for the 22-/23-
and 24-/25- view predicates in test-views.R: reads the real
inst/sql/26-balance_long.sql text off disk and executes it against a
synthetic corpus containing both an aggregate and non-aggregate row under
a real balance item_code (W01).
jared