chore: add SQLALCHEMY_POOL_USE_LIFO option and missing SQLALCHEMY_POOL_PRE_PING env default value. (#22371)

docker/.env.example

@@ -214,6 +214,10 @@ SQLALCHEMY_POOL_SIZE=30
 SQLALCHEMY_POOL_RECYCLE=3600
 # Whether to print SQL, default is false.
 SQLALCHEMY_ECHO=false
+# If True, will test connections for liveness upon each checkout
+SQLALCHEMY_POOL_PRE_PING=false
+# Whether to enable the Last in first out option or use default FIFO queue if is false
+SQLALCHEMY_POOL_USE_LIFO=false
 
 # Maximum number of connections to the database
 # Default is 100