- Import BITRATE_MATRIX_KBPS from shared constants - Parse and return bitrateMatrixOverrides in rowToLimits - Widen updateData type to accept null values - Raise maxBitrateKbps and minBitrateKbps caps from 50 000 to 1 000 000 kbps - Add full validation for bitrateMatrixOverrides (null to clear, key/value checks)