Add validator chain config overrides

internal/core/config/file_config.go

@@ -56,6 +56,7 @@ type fileModuleBinding struct {
 	Retries    int
 	Options    map[string]any
 	References map[string]string
+	Validators pipeline.ValidatorOverride
 }
 
 func (b *fileModuleBinding) UnmarshalYAML(node *yaml.Node) error {
@@ -102,6 +103,16 @@ func (b *fileModuleBinding) UnmarshalYAML(node *yaml.Node) error {
 					return err
 				}
 				b.References = references
+			case "validators":
+				b.Validators.Set = true
+				var validators []fileModuleBinding
+				if err := valueNode.Decode(&validators); err != nil {
+					return err
+				}
+				b.Validators.Validators = make([]pipeline.ModuleBinding, len(validators))
+				for i, validator := range validators {
+					b.Validators.Validators[i] = validator.toPipelineBinding()
+				}
 			default:
 				return fmt.Errorf("field %s not found in module binding", keyNode.Value)
 			}
@@ -119,6 +130,7 @@ func (b fileModuleBinding) toPipelineBinding() pipeline.ModuleBinding {
 		Retries:    b.Retries,
 		Options:    cloneOptions(b.Options),
 		References: normalizedStringMap(b.References),
+		Validators: b.Validators,
 	}
 }