Get the reference profile for one company

Single-company reference profile. Path token semantics: all-digits means CIK and is left-padded to 10 digits; anything else is treated as a case-insensitive ticker. Unresolved path tokens return NOT_FOUND.

Returns the DB-backed reference fields (name, primary ticker, CIK, primary exchange, SIC code + description, fiscal year end), the listing status, hasFinancials, and availableDatasets — the datasets that will actually return something for this company (empty for a covered filer with no financial statements yet). Docs-spec fields without a backing data source today (CUSIP, ISIN, GICS sector/industry, MIC code, country, currency, descriptions) are intentionally omitted until each upstream source lands.