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/static/store/js/team.js

@@ -194,7 +194,7 @@ function storeTeam() {
             this.saving = true;
             try {
                 await apiClient.put(
-                    `/store/${this.storeCode}/team/members/${this.selectedMember.user_id}`,
+                    `/store/team/members/${this.selectedMember.id}`,
                     this.editForm
                 );
 
@@ -228,7 +228,7 @@ function storeTeam() {
 
             this.saving = true;
             try {
-                await apiClient.delete(`/store/team/members/${this.selectedMember.user_id}`);
+                await apiClient.delete(`/store/team/members/${this.selectedMember.id}`);
 
                 Utils.showToast(I18n.t('tenancy.messages.team_member_removed'), 'success');
                 storeTeamLog.info('Removed team member:', this.selectedMember.user_id);