Get Sec 13D13G Debug

Learned from the 13F info-table filename bug (multiple back-and-forth debugging rounds with AJ to pin down): this time, build the raw- response diagnostic upfront instead of reactively. Runs the exact same EFTS request services.sec_13d_13g_service.search_recent_filings makes, but returns SEC's raw JSON response instead of the parsed/ filtered result, so a field-name mismatch in _extract_hit_fields can be spotted in one round-trip.