fix: merge main branch and renumber migration 027→037

Resolve 3 merge conflicts and renumber the automation_hooks migration
to follow main's migration chain (036_add_document_translation_fields).

Conflicts resolved:
- app/api/__init__.py: add automation_router alongside main's new routers
- app/utils/settings_service.py: add automation_hooks_enabled alongside compliance_enabled
- tests/conftest.py: add AutomationHook alongside AuditLog/ComplianceTemplate imports

Migration renumbered:
- 027_add_automation_hooks → 037_add_automation_hooks
- down_revision: 026_add_scheduled_jobs → 036_add_document_translation_fields

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

mobile/app/(auth)/_layout.tsx

@@ -0,0 +1,17 @@
+/**
+ * Layout for the unauthenticated route group: Welcome → Login.
+ *
+ * Uses a headerless native stack so the screens animate naturally.
+ */
+
+import { Stack } from "expo-router";
+import React from "react";
+
+export default function AuthLayout() {
+  return (
+    <Stack screenOptions={{ headerShown: false }}>
+      <Stack.Screen name="index" />
+      <Stack.Screen name="login" />
+    </Stack>
+  );
+}

mobile/app/(auth)/index.tsx

@@ -0,0 +1,4 @@
+/**
+ * Welcome screen route – first screen shown to unauthenticated users.
+ */
+export { default } from "../../src/screens/WelcomeScreen";

mobile/app/(auth)/login.tsx

@@ -0,0 +1,4 @@
+/**
+ * Login screen route – server URL entry and SSO sign-in.
+ */
+export { default } from "../../src/screens/LoginScreen";