FIX: Fix inconsistent instrument_class DF repr

Author: threecgreen

CHANGELOG.md

@@ -2,11 +2,13 @@
 
 ## 0.13.0 - TBD
 - Added support for `statistics` schema
+- Added batch download support data files (`condition.json` and `symbology.json`)
 - Upgraded `databento-dbn` to 0.6.0
 - Renamed `booklevel` MBP field to `levels` for brevity and consistent naming
 - Changed `flags` field to an unsigned int
 - Changed default of `ts_out` to `False` for `Live` client
 - Removed `open_interest_qty` and `cleared_volume` fields that were always unset from definition schema
+- Changed `instrument_class` DataFrame representation to be consistent with other `char` types
 
 ## 0.12.0 - 2023-05-01
 - Added `Live` client for connecting to Databento's live service

databento/common/data.py

@@ -223,20 +223,21 @@ def get_deriv_ba_types(level: int) -> List[Tuple[str, Union[type, str]]]:
     "security_type",
     "unit_of_measure",
     "underlying",
+    "strike_price_currency",
+    "instrument_class",
     "match_algorithm",
     "security_update_action",
     "user_defined_instrument",
-    "strike_price_currency",
 ]
 
 DEFINITION_PRICE_COLUMNS = [
     "min_price_increment",
-    "display_factor",
     "high_limit_price",
     "low_limit_price",
     "max_price_variation",
     "trading_reference_price",
     "min_price_increment_amount",
+    "price_ratio",
     "strike_price",
 ]