Fix build: Bundle schwab_scraper source and use local dependencies

schwab_scraper/features/accounts_positions/__init__.py

@@ -0,0 +1,14 @@
+"""Unified accounts and positions feature package."""
+
+from .accounts_scraper import list_accounts
+from .overview_scraper import get_account_overview
+from .positions_scraper import get_positions
+from .portfolio_scraper import get_portfolio_snapshot
+
+__all__ = [
+    "list_accounts",
+    "get_account_overview",
+    "get_positions",
+    "get_portfolio_snapshot",
+]
+