Add merge references and retry config

internal/framework/pipeline/module_test.go

@@ -15,6 +15,7 @@ func TestValidateModuleSpecAllowsReferenceSlotsForEligibleStages(t *testing.T) {
 	}{
 		{name: "chunker", kind: "chunker", stage: StageChunk},
 		{name: "extractor", kind: "extractor", stage: StageExtract},
+		{name: "merger", kind: "merger", stage: StageMerge},
 		{name: "normalizer", kind: "normalizer", stage: StageNormalize},
 	}
 
@@ -42,7 +43,6 @@ func TestValidateModuleSpecRejectsReferenceSlotsForIneligibleStages(t *testing.T
 		stage ModuleStage
 	}{
 		{name: "input", kind: "input adapter", stage: StageInput},
-		{name: "merge", kind: "merger", stage: StageMerge},
 		{name: "validate", kind: "validator", stage: StageValidate},
 		{name: "output", kind: "output encoder", stage: StageOutput},
 	}
@@ -99,6 +99,7 @@ func TestValidateModuleSpecRejectsInvalidReferenceSlotsForEligibleStages(t *test
 	}{
 		{name: "chunk", kind: "chunker", stage: StageChunk},
 		{name: "extract", kind: "extractor", stage: StageExtract},
+		{name: "merge", kind: "merger", stage: StageMerge},
 		{name: "normalize", kind: "normalizer", stage: StageNormalize},
 	}