fix(tenancy): fix team CRUD bugs + add member integration tests

Store team page:
- Fix undefined user_id (API returns `id`, JS used `user_id`)
- Fix wrong URL path in updateMember (remove redundant storeCode)
- Fix update_member_role route passing wrong kwarg (new_role_id → new_role_name)
- Add update_member() service method for role_id + is_active updates
- Add :selected binding for role pre-selection in edit modal

Merchant team page:
- Add missing db.commit() on invite, update, and remove endpoints
- Fix forward-reference string type annotation on MerchantTeamInvite
- Add :selected binding for role pre-selection in edit modal

Shared fixes:
- Replace removed subscription_service.check_team_limit with usage_service
- Replace removed subscription_service.get_current_tier in email service
- Fix email config bool settings crashing on .lower() (value_type=boolean)

Tests: 15 new integration tests for store team member API endpoints.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/modules/tenancy/templates/tenancy/merchant/team.html

@@ -299,7 +299,7 @@
                         <select x-model="store.role_name"
                                 class="px-2 py-1 text-sm text-gray-700 dark:text-gray-300 bg-white dark:bg-gray-700 border border-gray-300 dark:border-gray-600 rounded-md focus:border-purple-400 focus:outline-none">
                             <template x-for="role in roleOptions" :key="role.value">
-                                <option :value="role.value" x-text="role.label"></option>
+                                <option :value="role.value" :selected="role.value === store.role_name" x-text="role.label"></option>
                             </template>
                         </select>
                         <button @click="updateMemberRole(store.store_id, selectedMember.user_id, store.role_name)"

app/modules/tenancy/templates/tenancy/store/team.html

@@ -77,7 +77,7 @@
         </tr>
     </thead>
     <tbody class="bg-white divide-y dark:divide-gray-700 dark:bg-gray-800">
-        <template x-for="member in members" :key="member.user_id">
+        <template x-for="member in members" :key="member.id">
             <tr class="text-gray-700 dark:text-gray-400">
                 <!-- Member Info -->
                 <td class="px-4 py-3">
@@ -240,7 +240,7 @@
                     class="w-full px-4 py-2 text-sm text-gray-700 bg-gray-50 border border-gray-200 rounded-lg dark:text-gray-300 dark:bg-gray-700 dark:border-gray-600 focus:border-purple-400 focus:outline-none focus:ring-1 focus:ring-purple-400"
                 >
                     <template x-for="role in roles" :key="role.id">
-                        <option :value="role.id" x-text="role.name"></option>
+                        <option :value="role.id" :selected="role.id === editForm.role_id" x-text="role.name"></option>
                     </template>
                 </select>
             </div>