feat all: support kill switches in API schema (#54)

* Add lists with kill switches in response of `/configs/values`
* Add lists with kill switches in response of `/configs/values`
* Add lists with kill switches in request of `/admin/v1/configs`

docs/api/api.yaml

@@ -13,6 +13,10 @@ paths:
         post:
             description: |
                 A handle for getting config values.
+                Returns configs changed since updated_since and last update time.
+                If any changed configs are Kill Switches,
+                returns additional lists of enabled and disabled Kill Switches.
+                A config with a changed Kill Switch flag is considered changed.
             requestBody:
                 description: |
                     Parameters for config values
@@ -50,6 +54,18 @@ paths:
                                           type: object
                                           additionalProperties: true
                                           description: Map of received configs
+                                      kill_switches_enabled:
+                                          type: array
+                                          description: Enabled Kill Switches
+                                          items:
+                                              type: string
+                                              description: Config id
+                                      kill_switches_disabled:
+                                          type: array
+                                          description: Disabled Kill Switches
+                                          items:
+                                              type: string
+                                              description: Config id
                                       updated_at:
                                           type: string
                                           description: Time of last update
@@ -63,7 +79,11 @@ paths:
     /admin/v1/configs:
         post:
             description: |
-                Handle for adding (editing) configs
+                Handle for adding (editing) configs.
+                Changes (sets) config values and optionally their Kill Switch flags.
+                The configs specified in kill_switches_disabled and kill_switches_enabled
+                become disabled and enabled kill switches, respectively.
+                The rest become regular dynamic configs.
             requestBody:
                 description: |
                     Config parameters (you can add bulk)
@@ -81,6 +101,22 @@ paths:
                                     description: |
                                         Map key-values, config name and its value,
                                         you can have multiple configs at the same time
+                                kill_switches_enabled:
+                                    type: array
+                                    description: | 
+                                        Enabled Kill Switches,
+                                        must consist of ids from configs
+                                    items:
+                                        type: string
+                                        description: Config id
+                                kill_switches_disabled:
+                                    type: array
+                                    description: | 
+                                        Disabled Kill Switches,
+                                        must consist of ids from configs
+                                    items:
+                                        type: string
+                                        description: Config id
                                 service:
                                     type: string
                                     description: The name of the service to create/update for configs for