ops: Disable mempool loop for lightning backends

production/mempool-config.mainnet-lightning.json

@@ -1,5 +1,6 @@
 {
   "MEMPOOL": {
+    "ENABLED": false,
     "NETWORK": "mainnet",
     "BACKEND": "esplora",
     "HTTP_PORT": 8993,

production/mempool-config.signet-lightning.json

@@ -1,5 +1,6 @@
 {
   "MEMPOOL": {
+    "ENABLED": false,
     "NETWORK": "signet",
     "BACKEND": "esplora",
     "HTTP_PORT": 8991,

production/mempool-config.testnet-lightning.json

@@ -1,5 +1,6 @@
 {
   "MEMPOOL": {
+    "ENABLED": false,
     "NETWORK": "testnet",
     "BACKEND": "esplora",
     "HTTP_PORT": 8992,