docs: document standalone mode; bump to 1.4.0

Add README/docs/secrets.js.example coverage for the new
@simpleworkjs/orm-backed standalone mode (no LDAP/SSO), and promote the
CHANGELOG's Unreleased entry to 1.4.0.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

secrets.js.example

@@ -11,7 +11,24 @@
 module.exports = {
 	name: 'My Org',
 
+	// Standalone mode: run with no LDAP directory and no SSO Manager. When
+	// enabled, user auth and host discovery use the ORM-backed stores below
+	// instead of `ldap` + `sso` (both become unused). See the README's
+	// "Standalone mode" section for how to add users/hosts.
+	standalone: {
+		enabled: false,
+	},
+
+	// ORM config for standalone mode (Sequelize — any dialect works, not just
+	// sqlite). Ignored unless standalone.enabled is true.
+	orm: {
+		dialect: 'sqlite',
+		storage: './data/standalone.sqlite',
+		logging: false,
+	},
+
 	// The directory the users live in (the SSO Manager's OpenLDAP).
+	// Unused when standalone.enabled is true.
 	//
 	// IMPORTANT: bindDN needs, beyond read on ou=people + ou=groups, WRITE on
 	// the sshPublicKey attribute of user entries — the jump host injects its
@@ -36,6 +53,7 @@ module.exports = {
 
 	// SSO Manager directory (inventory) API. apiToken is a personal access
 	// token (sso_<id>_<secret>) of any user that can read /api/discovery/*.
+	// Unused when standalone.enabled is true.
 	sso: {
 		url: 'https://sso.example.com',
 		apiToken: 'sso_CHANGE_ME',