feat: publish sanitized custom.97 source

relay/channel/task/jsplugin/submit_stream.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"mime"
 	"net/http"
-	"slices"
 	"strings"
 	"time"
 
@@ -37,7 +36,7 @@ func (a *TaskAdaptor) readSubmitEvents(parent context.Context, resp *http.Respon
 	scanner := helper.NewStreamScanner(resp.Body, maxTaskPluginPersistedJSONBytes+1)
 	hook := "parseSubmitEvent"
 	var accumulated *pluginruntime.JSONState
-	if slices.Contains(a.plugin.Meta.RequiredCapabilities, pluginruntime.CapabilitySubmitSSEDelta) {
+	if pluginruntime.UsesSubmitEventDelta(a.plugin.Meta, a.plugin.Engine) {
 		hook = "parseSubmitEventDelta"
 		accumulated = pluginruntime.NewJSONState(maxTaskPluginPersistedJSONBytes)
 	}
@@ -117,15 +116,17 @@ func (a *TaskAdaptor) readSubmitEvents(parent context.Context, resp *http.Respon
 				return nil, fmt.Errorf("invalid submit stream changes: %w", err)
 			}
 		}
-		// Keep the exact encoded-byte limit above. Plain JSON state can be
-		// isolated without parsing large strings again; codec-specific values
-		// (for example exported typed arrays) retain the old normalization.
-		var plainJSON bool
-		state, plainJSON = cloneJSONValue(nextState, 0)
-		if !plainJSON {
-			if err = common.Unmarshal(encoded, &state); err != nil {
+		// Keep the exact encoded-byte limit above. Plain JSON state goes back
+		// to the next event as is; codec-specific values (for example exported
+		// typed arrays) retain the old normalization.
+		if isPlainJSONValue(nextState, 0) {
+			state = nextState
+		} else {
+			var decoded any
+			if err = common.Unmarshal(encoded, &decoded); err != nil {
 				return nil, err
 			}
+			state = decoded
 		}
 		if done {
 			if accumulated != nil {