fix vault 403 for real (v1.23.0)

- /api/vault proxy now injects X-Vault-Token: the proxy declared its request
  hook with http-proxy-middleware v3 syntax (on: { proxyReq }), which the
  installed HPM v2 silently ignores — so every vault call reached OpenBao
  unauthenticated (the recurring 403). Rewritten as v2 onProxyReq.
- Header injection ordered before fixRequestBody (the body write flushes
  headers; setting X-Vault-Token after it failed on every POST/PUT).
- initORM add-only schema heal: sequelize.sync() never ALTERs, so newer columns
  (PluginInstance.lastLog) are now added via describeTable + addColumn.
- Long-lived external-app tokens via sso-app role (768h periodic); VaultAppToken
  stores each app token's accessor and renews it at boot + every 6h; re-minting
  revokes the previous token via its accessor.
- Wire-level tests for the vault proxy + app-token accessor lifecycle.
- package.json + lockfile bumped to 1.23.0.

Co-Authored-By: Claude <noreply@anthropic.com>

nodejs/package.json

@@ -1,6 +1,6 @@
 {
   "name": "t42-sso-manager",
-  "version": "1.22.0",
+  "version": "1.23.0",
   "description": "A very simple LDAP management and SSO system",
   "author": [
     {