[MM-60689] Add Webhook ID in the logs (#28846)

* add webhook id to logs

* Move hook_id context to api level from app level.

* pass errCtx to other references of same app-error-id

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/app/post.go

@@ -118,12 +118,13 @@ func (a *App) CreatePostAsUser(c request.CTX, post *model.Post, currentSessionId
 func (a *App) CreatePostMissingChannel(c request.CTX, post *model.Post, triggerWebhooks bool, setOnline bool) (*model.Post, *model.AppError) {
 	channel, err := a.Srv().Store().Channel().Get(post.ChannelId, true)
 	if err != nil {
+		errCtx := map[string]any{"channel_id": post.ChannelId}
 		var nfErr *store.ErrNotFound
 		switch {
 		case errors.As(err, &nfErr):
-			return nil, model.NewAppError("CreatePostMissingChannel", "app.channel.get.existing.app_error", nil, "", http.StatusNotFound).Wrap(err)
+			return nil, model.NewAppError("CreatePostMissingChannel", "app.channel.get.existing.app_error", errCtx, "", http.StatusNotFound).Wrap(err)
 		default:
-			return nil, model.NewAppError("CreatePostMissingChannel", "app.channel.get.find.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
+			return nil, model.NewAppError("CreatePostMissingChannel", "app.channel.get.find.app_error", errCtx, "", http.StatusInternalServerError).Wrap(err)
 		}
 	}
 
@@ -573,7 +574,7 @@ func (a *App) handlePostEvents(c request.CTX, post *model.Post, user *model.User
 	if triggerWebhooks {
 		a.Srv().Go(func() {
 			if err := a.handleWebhookEvents(c, post, team, channel, user); err != nil {
-				c.Logger().Error("Failed to handle webhook event", mlog.Err(err))
+				c.Logger().Error("Failed to handle webhook event", mlog.String("user_id", user.Id), mlog.String("post_id", post.Id), mlog.Err(err))
 			}
 		})
 	}