feat(ECR-044): RhythmConfig 写面闭环并 Closed

复用 admin.explore.write、POST/PUT+审计、C端 GET /rhythm/configs、
H5 无 active 空态/失败回退；migration 000053。ExploreConfig Loop STOP，禁自动 ECR-045。

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/migrations/000053_ops_rhythm_config_write.up.sql

@@ -0,0 +1,7 @@
+-- ECR-044 ExploreConfig RhythmConfig write (reuse admin.explore.write from 000052)
+
+INSERT INTO admin_role_permissions(role_id, code)
+SELECT r.id, 'admin.explore.write'
+FROM admin_roles r
+WHERE r.name = 'super_admin'
+ON CONFLICT DO NOTHING;