Use string for reason

Author: long-nt-tran

openapi/openapiv2.json

@@ -9200,7 +9200,7 @@
           "type": "string"
         },
         "reason": {
-          "$ref": "#/definitions/v1LinkReason"
+          "type": "string"
         }
       },
       "description": "A link to a workflow execution. This is a more general version of WorkflowEvent that doesn't specify a \nparticular event within the workflow, useful when you want to link to a workflow but there is no particular event to link to,\nsuch as a Query or a Rejected Update."
@@ -14200,16 +14200,6 @@
       },
       "description": "Link can be associated with history events. It might contain information about an external entity\nrelated to the history event. For example, workflow A makes a Nexus call that starts workflow B:\nin this case, a history event in workflow A could contain a Link to the workflow started event in\nworkflow B, and vice-versa."
     },
-    "v1LinkReason": {
-      "type": "string",
-      "enum": [
-        "LINK_REASON_UNSPECIFIED",
-        "LINK_REASON_QUERY",
-        "LINK_REASON_UPDATE_REJECTED"
-      ],
-      "default": "LINK_REASON_UNSPECIFIED",
-      "description": "LinkReason is the reason for linking to a workflow execution."
-    },
     "v1ListActivityExecutionsResponse": {
       "type": "object",
       "properties": {

openapi/openapiv3.yaml

@@ -10982,12 +10982,7 @@ components:
         runId:
           type: string
         reason:
-          enum:
-            - LINK_REASON_UNSPECIFIED
-            - LINK_REASON_QUERY
-            - LINK_REASON_UPDATE_REJECTED
           type: string
-          format: enum
       description: "A link to a workflow execution. This is a more general version of WorkflowEvent that doesn't specify a \n particular event within the workflow, useful when you want to link to a workflow but there is no particular event to link to,\n such as a Query or a Rejected Update."
     Link_WorkflowEvent:
       type: object

temporal/api/common/v1/message.proto

@@ -15,7 +15,6 @@ import "google/protobuf/empty.proto";
 import "temporal/api/enums/v1/common.proto";
 import "temporal/api/enums/v1/event_type.proto";
 import "temporal/api/enums/v1/reset.proto";
-import "temporal/api/enums/v1/link.proto";
 
 message DataBlob {
     temporal.api.enums.v1.EncodingType encoding_type = 1;
@@ -255,7 +254,7 @@ message Link {
         string namespace = 1;
         string workflow_id = 2;
         string run_id = 3;
-        temporal.api.enums.v1.LinkReason reason = 4;
+        string reason = 4;
     }
 
     oneof variant {