Simplify account_risk_state DDL for PostgreSQL compatibility.

Co-authored-by: Cursor <cursoragent@cursor.com>

risk/account_risk_lib.py

@@ -101,7 +101,7 @@ _SCHEMA_READY = False
 
 ACCOUNT_RISK_STATE_SQL = """
 CREATE TABLE IF NOT EXISTS account_risk_state (
-    id INTEGER NOT NULL PRIMARY KEY CHECK (id = 1),
+    id INTEGER PRIMARY KEY,
     trading_day TEXT,
     manual_close_count INTEGER DEFAULT 0,
     cooloff_until_ms INTEGER,
@@ -112,12 +112,6 @@ CREATE TABLE IF NOT EXISTS account_risk_state (
 )
 """
 
-SEED_ACCOUNT_RISK_SQL = """
-INSERT INTO account_risk_state (id, trading_day, manual_close_count, daily_frozen)
-VALUES (1, '', 0, 0)
-ON CONFLICT(id) DO NOTHING
-"""
-
 
 def _account_risk_table_exists(conn) -> bool:
     try:
@@ -152,7 +146,12 @@ def ensure_account_risk_schema(conn) -> None:
         return
     _SCHEMA_READY = False
     conn.execute(ACCOUNT_RISK_STATE_SQL)
-    conn.execute(SEED_ACCOUNT_RISK_SQL)
+    conn.commit()
+    if not conn.execute("SELECT 1 FROM account_risk_state WHERE id=1").fetchone():
+        conn.execute(
+            "INSERT INTO account_risk_state (id, trading_day, manual_close_count, daily_frozen) "
+            "VALUES (1, '', 0, 0)"
+        )
     conn.commit()
     _SCHEMA_READY = True