refactor(Postgres Node): Backport connection pooling to postgres v1 (#12484)

packages/nodes-base/credentials/Postgres.credentials.ts

@@ -37,6 +37,14 @@ export class Postgres implements ICredentialType {
 			},
 			default: '',
 		},
+		{
+			displayName: 'Maximum Number of Connections',
+			name: 'maxConnections',
+			type: 'number',
+			default: 100,
+			description:
+				'Make sure this value times the number of workers you have is lower than the maximum number of connections your postgres instance allows.',
+		},
 		{
 			displayName: 'Ignore SSL Issues (Insecure)',
 			name: 'allowUnauthorizedCerts',