Add flag to restore activity options to reset and update (#593)

<!-- Describe what has changed in this PR -->
**What changed?**
Add flags to activity reset/activity update-options requests to support
"restore original options" behaviour.

<!-- Tell your future self why have you made these changes -->
**Why?**
They will help users to "reset" their changes.

<!-- Are there any breaking changes on binary or code level? -->
**Breaking changes**
No

Author: ychebotarev

openapi/openapiv2.json

@@ -7453,6 +7453,10 @@
         "jitter": {
           "type": "string",
           "title": "If set, and activity is in backoff, the activity will start at a random time within the specified jitter duration.\n(unless it is paused and keep_paused is set)"
+        },
+        "restoreOriginalOptions": {
+          "type": "boolean",
+          "description": "If set, the activity options will be restored to the defaults.\nDefault options are then options activity was created with.\nThey are part of the first SCHEDULE event."
         }
       }
     },
@@ -8190,6 +8194,10 @@
         "type": {
           "type": "string",
           "description": "Update all running activities of this type."
+        },
+        "restoreOriginal": {
+          "type": "boolean",
+          "description": "If set, the activity options will be restored to the default.\nDefault options are then options activity was created with.\nThey are part of the first SCHEDULE event.\nThis flag cannot be combined with any other option; if you supply\nrestore_original together with other options, the request will be rejected."
         }
       }
     },

openapi/openapiv3.yaml

@@ -9740,6 +9740,12 @@ components:
           description: |-
             If set, and activity is in backoff, the activity will start at a random time within the specified jitter duration.
              (unless it is paused and keep_paused is set)
+        restoreOriginalOptions:
+          type: boolean
+          description: |-
+            If set, the activity options will be restored to the defaults.
+             Default options are then options activity was created with.
+             They are part of the first SCHEDULE event.
     ResetActivityResponse:
       type: object
       properties: {}
@@ -11762,6 +11768,14 @@ components:
         type:
           type: string
           description: Update all running activities of this type.
+        restoreOriginal:
+          type: boolean
+          description: |-
+            If set, the activity options will be restored to the default.
+             Default options are then options activity was created with.
+             They are part of the first SCHEDULE event.
+             This flag cannot be combined with any other option; if you supply
+             restore_original together with other options, the request will be rejected.
     UpdateActivityOptionsResponse:
       type: object
       properties:

temporal/api/workflowservice/v1/request_response.proto

@@ -1835,13 +1835,20 @@ message UpdateActivityOptionsRequest {
     // Controls which fields from `activity_options` will be applied
     google.protobuf.FieldMask update_mask = 5;
 
-        // either activity id or activity type must be provided
-        oneof activity {
-            // Only activity with this ID will be updated.
-            string id = 6;
-            // Update all running activities of this type.
-            string type = 7;
-        }
+    // either activity id or activity type must be provided
+    oneof activity {
+        // Only activity with this ID will be updated.
+        string id = 6;
+        // Update all running activities of this type.
+        string type = 7;
+    }
+
+    // If set, the activity options will be restored to the default.
+    // Default options are then options activity was created with.
+    // They are part of the first SCHEDULE event.
+    // This flag cannot be combined with any other option; if you supply
+    // restore_original together with other options, the request will be rejected.
+    bool restore_original = 8;
 }
 
 message UpdateActivityOptionsResponse {
@@ -1932,6 +1939,12 @@ message ResetActivityRequest {
     // If set, and activity is in backoff, the activity will start at a random time within the specified jitter duration.
     // (unless it is paused and keep_paused is set)
     google.protobuf.Duration jitter = 8;
+
+    // If set, the activity options will be restored to the defaults.
+    // Default options are then options activity was created with.
+    // They are part of the first SCHEDULE event.
+    bool restore_original_options = 9;
+
 }
 
 message ResetActivityResponse {