Updated the load invoice to see the old history of patient

core/database.py

@@ -8,7 +8,12 @@ load_dotenv()
 
 DATABASE_URL = os.getenv("DATABASE_URL")
 
-engine = create_engine(DATABASE_URL)
+# HF/Neon can drop idle connections; pre_ping + recycle avoids stale connections.
+engine = create_engine(
+    DATABASE_URL,
+    pool_pre_ping=True,
+    pool_recycle=300,
+)
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
 Base = declarative_base()
 
@@ -18,4 +23,4 @@ def get_db():
     try:
         yield db
     finally:
-        db.close()
+        db.close()