add missing field descriptions to yfinance equity price historical (#6116)

Co-authored-by: Igor Radovanovic <74266147+IgorWounds@users.noreply.github.com>

openbb_platform/providers/yfinance/openbb_yfinance/models/equity_historical.py

@@ -73,6 +73,20 @@ class YFinanceEquityHistoricalQueryParams(EquityHistoricalQueryParams):
 class YFinanceEquityHistoricalData(EquityHistoricalData):
     """Yahoo Finance Equity Historical Price Data."""
 
+    __alias_dict__ = {
+        "split_ratio": "stock_splits",
+        "dividend": "dividends",
+    }
+
+    split_ratio: Optional[float] = Field(
+        default=None,
+        description="Ratio of the equity split, if a split occurred.",
+    )
+    dividend: Optional[float] = Field(
+        default=None,
+        description="Dividend amount (split-adjusted), if a dividend was paid.",
+    )
+
     @field_validator("date", mode="before", check_fields=False)
     def date_validate(cls, v):  # pylint: disable=E0213
         """Return formatted datetime."""
@@ -164,6 +178,11 @@ class YFinanceEquityHistoricalFetcher(
         if query.interval in ["1d", "1W", "1M", "3M"]:
             data["date"] = data["date"].dt.strftime("%Y-%m-%d")
 
+        if "dividends" in data.columns and data.dividends.sum() == 0:
+            data.drop(columns=["dividends"], inplace=True)
+        if "stock_splits" in data.columns and all(data.stock_splits) == 0:
+            data.drop(columns=["stock_splits"], inplace=True)
+
         return data.to_dict("records")
 
     @staticmethod