feat: add node_control_sessions DB migration (#675)

* feat: add node_control_sessions DB migration

Add the node_control_sessions table for WS control plane lease management.
Single row per appId with atomic INSERT ON CONFLICT to prevent dual-node races.

* chore: bump @moneydevkit/api-contract to 0.1.24

Update workspace api-contract source and moneydevkit.com dependency
to match the newly published 0.1.24 which includes nodeControl
contract and checkout.mintInvoice.

* chore: update pnpm lockfile for api-contract 0.1.24

Author: martinsaposnic

packages/api-contract/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@moneydevkit/api-contract",
-  "version": "0.1.23",
+  "version": "0.1.24",
   "description": "API Contract for moneydevkit",
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",