v0.5.0: 3 стенда — изоляция состояния, WSGI middleware, OpenAPI server selector, POLYGON_STANDS env

- loader.py: STANDS dict, get_services/get_ops_index per stand, POLYGON_STANDS env
- mock_state.py: get_state(stand_id) — ленивая инициализация
- app.py: StandMiddleware — перезапись PATH_INFO до Flask-роутинга
- Все роуты: LocalProxy(state), LocalProxy(SERVICES/OPS_INDEX) через g.stand_id
- openapi.py: _build_servers() — по одному серверу на стенд
- services/stand{1,2,3}/ — 37 YAML на стенд из STANDS/dev и STANDS/test
- tests/test_api.py: +4 multi-stand теста (изоляция, fail-next, OpenAPI servers)
- Обратная совместимость: /api/v1/svc/... → стенд по умолчанию

site/services/stand1/13_s3bucket.yaml

@@ -0,0 +1,90 @@
+name: s3bucket
+service_id: 13
+service_display_name: S3 бакет
+service_short_name: s3bucket
+lifecycle:
+  suspendOnDestroyDefault: false
+  adoptExistingOnCreateDefault: false
+operations:
+- svcOperationId: 51
+  operation: create
+  kind: instance
+  action: create
+- svcOperationId: 52
+  operation: delete
+  kind: instance
+  action: delete
+stateOut: {}
+cfsParams:
+- svcOperationCfsParamId: 124
+  svcOperationCfsParam: s3UserUid
+  dataType: uuid
+  isRequired: true
+  defaultValue: ''
+  isModifiable: false
+- svcOperationCfsParamId: 125
+  svcOperationCfsParam: bucketName
+  dataType: string
+  isRequired: true
+  defaultValue: ''
+  isModifiable: false
+- svcOperationCfsParamId: 126
+  svcOperationCfsParam: maxSize
+  dataType: string
+  isRequired: true
+  defaultValue: '-1'
+  isModifiable: false
+- svcOperationCfsParamId: 127
+  svcOperationCfsParam: readAll
+  dataType: boolean
+  isRequired: true
+  defaultValue: 'false'
+  isModifiable: false
+  valueList:
+  - 'false'
+  - 'true'
+- svcOperationCfsParamId: 128
+  svcOperationCfsParam: listAll
+  dataType: boolean
+  isRequired: true
+  defaultValue: 'false'
+  isModifiable: false
+  valueList:
+  - 'false'
+  - 'true'
+- svcOperationCfsParamId: 129
+  svcOperationCfsParam: corsAll
+  dataType: boolean
+  isRequired: true
+  defaultValue: 'false'
+  isModifiable: false
+  valueList:
+  - 'false'
+  - 'true'
+- svcOperationCfsParamId: 130
+  svcOperationCfsParam: placement
+  dataType: string
+  isRequired: true
+  defaultValue: HOT
+  isModifiable: false
+  valueList:
+  - HOT
+  - COLD
+cfsParamsByOp:
+  51:
+  - 124
+  - 125
+  - 126
+  - 127
+  - 128
+  - 129
+  - 130
+  52: []
+stateParams:
+  s3UserUid: ''
+  bucketName: ''
+  maxSize: '-1'
+  readAll: 'false'
+  listAll: 'false'
+  corsAll: 'false'
+  placement: HOT