feat: add organization-level certificate toggle and update tower-governor imports

services/cms-service/migrations/20260414000001_add_certificate_toggle.sql

@@ -4,5 +4,11 @@
 ALTER TABLE organization_exercise_settings
     ADD COLUMN IF NOT EXISTS certificates_enabled BOOLEAN NOT NULL DEFAULT TRUE;
 
+ALTER TABLE organizations
+    ADD COLUMN IF NOT EXISTS certificates_enabled BOOLEAN NOT NULL DEFAULT TRUE;
+
 COMMENT ON COLUMN organization_exercise_settings.certificates_enabled 
     IS 'Enable/disable built-in certificate generation. When false, students cannot generate/download certificates from the platform.';
+
+COMMENT ON COLUMN organizations.certificates_enabled 
+    IS 'Enable/disable built-in certificate generation. When false, students cannot generate/download certificates from the platform.';