Enhance comments in task_queue.proto for clarity (#668)

Added comments to clarify the purpose of TaskQueueKind.

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<!-- Describe what has changed in this PR -->
**What changed?**
Added comments to `TaskQueueKind` clarifying that the field is for
wether a task queue is sticky and therefore only applies to workflow
tasks; thus will be unspecified if it is for any non-workflow task

<!-- Tell your future self why have you made these changes -->
**Why?**
Requested by Temporal Cloud Customer for Clarity

Author: billrich2001

openapi/openapiv2.json

@@ -1490,7 +1490,7 @@
           },
           {
             "name": "taskQueue.kind",
-            "description": "Default: TASK_QUEUE_KIND_NORMAL.\n\n - TASK_QUEUE_KIND_NORMAL: Tasks from a normal workflow task queue always include complete workflow history\n\nThe task queue specified by the user is always a normal task queue. There can be as many\nworkers as desired for a single normal task queue. All those workers may pick up tasks from\nthat queue.\n - TASK_QUEUE_KIND_STICKY: A sticky queue only includes new history since the last workflow task, and they are\nper-worker.\n\nSticky queues are created dynamically by each worker during their start up. They only exist\nfor the lifetime of the worker process. Tasks in a sticky task queue are only available to\nthe worker that created the sticky queue.\n\nSticky queues are only for workflow tasks. There are no sticky task queues for activities.",
+            "description": "Default: TASK_QUEUE_KIND_NORMAL.\n\n - TASK_QUEUE_KIND_UNSPECIFIED: Tasks from any non workflow task may be unspecified.\n\nTask queue kind is used to differentiate whether a workflow task queue is sticky or \nnormal. If a task is not a workflow task, Task queue kind will sometimes be \nunspecified.\n - TASK_QUEUE_KIND_NORMAL: Tasks from a normal workflow task queue always include complete workflow history\n\nThe task queue specified by the user is always a normal task queue. There can be as many\nworkers as desired for a single normal task queue. All those workers may pick up tasks from\nthat queue.\n - TASK_QUEUE_KIND_STICKY: A sticky queue only includes new history since the last workflow task, and they are\nper-worker.\n\nSticky queues are created dynamically by each worker during their start up. They only exist\nfor the lifetime of the worker process. Tasks in a sticky task queue are only available to\nthe worker that created the sticky queue.\n\nSticky queues are only for workflow tasks. There are no sticky task queues for activities.",
             "in": "query",
             "required": false,
             "type": "string",
@@ -5354,7 +5354,7 @@
           },
           {
             "name": "taskQueue.kind",
-            "description": "Default: TASK_QUEUE_KIND_NORMAL.\n\n - TASK_QUEUE_KIND_NORMAL: Tasks from a normal workflow task queue always include complete workflow history\n\nThe task queue specified by the user is always a normal task queue. There can be as many\nworkers as desired for a single normal task queue. All those workers may pick up tasks from\nthat queue.\n - TASK_QUEUE_KIND_STICKY: A sticky queue only includes new history since the last workflow task, and they are\nper-worker.\n\nSticky queues are created dynamically by each worker during their start up. They only exist\nfor the lifetime of the worker process. Tasks in a sticky task queue are only available to\nthe worker that created the sticky queue.\n\nSticky queues are only for workflow tasks. There are no sticky task queues for activities.",
+            "description": "Default: TASK_QUEUE_KIND_NORMAL.\n\n - TASK_QUEUE_KIND_UNSPECIFIED: Tasks from any non workflow task may be unspecified.\n\nTask queue kind is used to differentiate whether a workflow task queue is sticky or \nnormal. If a task is not a workflow task, Task queue kind will sometimes be \nunspecified.\n - TASK_QUEUE_KIND_NORMAL: Tasks from a normal workflow task queue always include complete workflow history\n\nThe task queue specified by the user is always a normal task queue. There can be as many\nworkers as desired for a single normal task queue. All those workers may pick up tasks from\nthat queue.\n - TASK_QUEUE_KIND_STICKY: A sticky queue only includes new history since the last workflow task, and they are\nper-worker.\n\nSticky queues are created dynamically by each worker during their start up. They only exist\nfor the lifetime of the worker process. Tasks in a sticky task queue are only available to\nthe worker that created the sticky queue.\n\nSticky queues are only for workflow tasks. There are no sticky task queues for activities.",
             "in": "query",
             "required": false,
             "type": "string",
@@ -15498,8 +15498,7 @@
         "TASK_QUEUE_KIND_STICKY"
       ],
       "default": "TASK_QUEUE_KIND_UNSPECIFIED",
-      "description": "The task queue specified by the user is always a normal task queue. There can be as many\nworkers as desired for a single normal task queue. All those workers may pick up tasks from\nthat queue.\n - TASK_QUEUE_KIND_STICKY: A sticky queue only includes new history since the last workflow task, and they are\nper-worker.\n\nSticky queues are created dynamically by each worker during their start up. They only exist\nfor the lifetime of the worker process. Tasks in a sticky task queue are only available to\nthe worker that created the sticky queue.\n\nSticky queues are only for workflow tasks. There are no sticky task queues for activities.",
-      "title": "- TASK_QUEUE_KIND_NORMAL: Tasks from a normal workflow task queue always include complete workflow history"
+      "description": " - TASK_QUEUE_KIND_UNSPECIFIED: Tasks from any non workflow task may be unspecified.\n\nTask queue kind is used to differentiate whether a workflow task queue is sticky or \nnormal. If a task is not a workflow task, Task queue kind will sometimes be \nunspecified.\n - TASK_QUEUE_KIND_NORMAL: Tasks from a normal workflow task queue always include complete workflow history\n\nThe task queue specified by the user is always a normal task queue. There can be as many\nworkers as desired for a single normal task queue. All those workers may pick up tasks from\nthat queue.\n - TASK_QUEUE_KIND_STICKY: A sticky queue only includes new history since the last workflow task, and they are\nper-worker.\n\nSticky queues are created dynamically by each worker during their start up. They only exist\nfor the lifetime of the worker process. Tasks in a sticky task queue are only available to\nthe worker that created the sticky queue.\n\nSticky queues are only for workflow tasks. There are no sticky task queues for activities."
     },
     "v1TaskQueueMetadata": {
       "type": "object",

temporal/api/enums/v1/task_queue.proto

@@ -10,6 +10,11 @@ option ruby_package = "Temporalio::Api::Enums::V1";
 option csharp_namespace = "Temporalio.Api.Enums.V1";
 
 enum TaskQueueKind {
+    // Tasks from any non workflow task may be unspecified.
+    //
+    // Task queue kind is used to differentiate whether a workflow task queue is sticky or 
+    // normal. If a task is not a workflow task, Task queue kind will sometimes be 
+    // unspecified.
     TASK_QUEUE_KIND_UNSPECIFIED = 0;
     // Tasks from a normal workflow task queue always include complete workflow history
     //