states fiscal heads

Survey heads summed over States for April..month of `fy`, against the same window a year earlier: rows {fy, month, head, actual, be, prev_actual, yoy_pct, pct_of_be}. Heads: RR TR SCT SOTR NTR GIA NDR GST STAMPS LAND SALES EXCISE OTHER_TAX RE INTEREST SALARIES PENSION SUBSIDY OTHER_RE CO LA TE RD FD PD. Defaults are the 2025-26 Survey's Charts II.16-II.20: 27 States (no Goa); BR, SK October; MN, N