chore: update engine bump migration to set default block time

- Modified the networks table to add a default value for the block_time column.
- Updated the atlas checksum for the new migration file.

Author: chibie

ent/migrate/migrations/20250608014647_engine_bump.sql

@@ -5,7 +5,7 @@ ALTER TABLE "linked_addresses" ALTER COLUMN "salt" DROP NOT NULL;
 -- Modify "lock_payment_orders" table
 ALTER TABLE "lock_payment_orders" ADD COLUMN "sender" character varying NULL;
 -- Modify "networks" table
-ALTER TABLE "networks" DROP COLUMN "chain_id_hex", ADD COLUMN "block_time" double precision NOT NULL;
+ALTER TABLE "networks" DROP COLUMN "chain_id_hex", ADD COLUMN "block_time" double precision NOT NULL DEFAULT 2;
 -- Drop index "receive_addresses_salt_key" from table: "receive_addresses"
 DROP INDEX "receive_addresses_salt_key";
 -- Modify "receive_addresses" table

ent/migrate/migrations/atlas.sum

@@ -1,4 +1,4 @@
-h1:sFWfYd8p6cVh3pgFwQ+qIr+HJdn/5TyhTsF67EJsCqQ=
+h1:iFEnr6tY2u1o6mZ1BwHtd8Y7AdwP9MOi6m0/rUBPyq0=
 20240118234246_initial.sql h1:dYuYBqns33WT+3p8VQvbKUP62k3k6w6h8S+FqNqgSvU=
 20240130122324_order_from_address.sql h1:mMVI2iBUd1roIYLUqu0d2jZ7+B6exppRN8qqn+aIHx4=
 20240202010744_fees_on_order.sql h1:P7ngxZKqDKefBM5vk6M3kbWeMPVwbZ4MZVcLBjEfS34=
@@ -54,4 +54,4 @@ h1:sFWfYd8p6cVh3pgFwQ+qIr+HJdn/5TyhTsF67EJsCqQ=
 20250505033210_ugx_bank_institutions.sql h1:8ex3xOuruqqPQJbcR9rUNpPDHU4n8Q3URvUIXQ6oDDE=
 20250510231545_order_metadata.sql h1:BrHlYt3LvuYcnsw7b9xfzjg5U4D1RfPy+RusxRDj66k=
 20250517004500_brl_institutions.sql h1:w/xeXviTmKXCVt7s+h1nVfciXgB717stoY+T9GLnH8c=
-20250608014647_engine_bump.sql h1:HadB3kvSCnbjRzvZ25iLTyA6S2EFpuAs/mPVd7m3ELk=
+20250608014647_engine_bump.sql h1:lDpdJhk2jYJao9Gc6HpMiXkAmkeLujowwKHHT7W+U8c=