Map Wikipedia's PSKY to IBKR's SKYD

Paramount Skydance moved its listing to NYSE as SKYD; Wikipedia still
lists the old NASDAQ ticker PSKY, which IBKR cannot qualify.

src/ibkr_quant/universe.py

@@ -7,7 +7,12 @@ import pandas as pd
 SP500_URL = "https://en.wikipedia.org/wiki/List_of_S%26P_500_companies"
 
 
+# Tickers Wikipedia lists differently from what IBKR carries.
+IBKR_SYMBOL_OVERRIDES = {"PSKY": "SKYD"}  # Paramount Skydance trades as SKYD/NYSE on IBKR
+
+
 def to_ib_symbol(ticker: str) -> str:
+    ticker = IBKR_SYMBOL_OVERRIDES.get(ticker, ticker)
     # IBKR writes share classes with a space: BRK.B -> "BRK B".
     return ticker.replace(".", " ")