T30+T31: add dapp is_new_version bool field, default false (V21, §I.getDapps)

app/db.py

@@ -60,6 +60,11 @@ def _ensure_migrations(engine):
 
         with engine.begin() as conn:
             conn.execute(text("ALTER TABLE dapps ADD COLUMN is_live_override BOOLEAN NOT NULL DEFAULT 0"))
+    if "is_new_version" not in cols:
+        from sqlalchemy import text
+
+        with engine.begin() as conn:
+            conn.execute(text("ALTER TABLE dapps ADD COLUMN is_new_version BOOLEAN NOT NULL DEFAULT 0"))
 
 
 def init_db():