chore(lint): make the repository ruff-clean under the strict select

Clear the deferred full-repo lint backlog so the whole tree passes the strict
ruff select (E,W,F,I,B,UP,C4,SIM). Mechanical fixes dominate: import sorting,
pep585/604 annotations, dropped dead imports, and whitespace. The few semantic
changes are behavior-preserving: declare __all__ on the agent_utils and
alpha_vantage re-export hubs; expand 'from x import *' to explicit names; use
immutable tuple defaults instead of mutable list defaults; contextlib.suppress
for try/except/pass; and narrow an over-broad assertRaises.

tradingagents/agents/utils/fundamental_data_tools.py

@@ -1,5 +1,7 @@
-from langchain_core.tools import tool
 from typing import Annotated
+
+from langchain_core.tools import tool
+
 from tradingagents.dataflows.interface import route_to_vendor
 
 
@@ -74,4 +76,4 @@ def get_income_statement(
     Returns:
         str: A formatted report containing income statement data
     """
-    return route_to_vendor("get_income_statement", ticker, freq, curr_date)
+    return route_to_vendor("get_income_statement", ticker, freq, curr_date)