BUG: Make Series flex methods (truediv, floordiv, etc.) raise NotImplementedError for bool dtypes

Use arithmetic_op for arithmetic operations in Series._binop() to ensure
flex methods like truediv(), floordiv(), pow() raise NotImplementedError
for bool dtypes, consistent with their dunder counterparts.

Comparison operations (gt, lt, etc.) continue to use direct function calls
to preserve their existing behavior.

Closes #63250

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: majiayu000

pandas/core/series.py

@@ -6718,7 +6718,20 @@ def _binop(self, other: Series, func, level=None, fill_value=None) -> Series:
         this_vals, other_vals = ops.fill_binop(this._values, other._values, fill_value)
 
         with np.errstate(all="ignore"):
-            result = func(this_vals, other_vals)
+            # GH#63250: Use arithmetic_op for arithmetic operations to ensure
+            # consistent behavior with dunder methods (includes _bool_arith_check)
+            # But use direct func call for comparison operations (gt, lt, etc.)
+            if func in (
+                operator.gt,
+                operator.ge,
+                operator.lt,
+                operator.le,
+                operator.eq,
+                operator.ne,
+            ):
+                result = func(this_vals, other_vals)
+            else:
+                result = ops.arithmetic_op(this_vals, other_vals, func)
 
         name = ops.get_op_result_name(self, other)