feat: export A-share specific data functions from eqlib module

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: AlanFokCo

eqlib/__init__.py

@@ -94,6 +94,11 @@ def market_open(context):
     set_universe, get_universe,
     # Lifecycle callbacks  [STABLE]
     before_trading_start, after_trading_end,
+    # A-share market specific data  [EXPERIMENTAL]
+    get_north_money_flow,
+    get_margin_data,
+    get_limit_up_down_stats,
+    get_restriction_release,
 )
 
 # Logging  [STABLE]
@@ -286,6 +291,9 @@ def __repr__(self):
     "set_universe", "get_universe",
     # P0: Lifecycle callbacks
     "before_trading_start", "after_trading_end",
+    # A-share market specific data
+    "get_north_money_flow", "get_margin_data",
+    "get_limit_up_down_stats", "get_restriction_release",
     # Logging
     "log",
     # Objects

tests/test_ashare_data.py

@@ -143,4 +143,21 @@ def test_days_parameter(self):
         df_60 = get_restriction_release(days=60)
 
         # 60 天范围应包含更多解禁事件
-        assert len(df_60) >= len(df_30)
+        assert len(df_60) >= len(df_30)
+
+
+class TestModuleExports:
+    """Tests for module exports."""
+
+    def test_import_from_eqlib(self):
+        """验证可以从 eqlib 导入"""
+        from eqlib import (
+            get_north_money_flow,
+            get_margin_data,
+            get_limit_up_down_stats,
+            get_restriction_release,
+        )
+        assert get_north_money_flow is not None
+        assert get_margin_data is not None
+        assert get_limit_up_down_stats is not None
+        assert get_restriction_release is not None