Add merge references and retry config

internal/core/config/file_config_test.go

@@ -127,6 +127,7 @@ pipelines:
     input: fake/input
     chunk:
       module: generic
+      retries: 2
       options:
         size: 10
         flags:
@@ -138,9 +139,12 @@ pipelines:
         extract:
           module: fake/extract
           llm_profile: fast
+          retries: 3
           options:
             temperature: 0
-        merge: appendorder
+        merge:
+          module: appendorder
+          retries: 1
         normalize:
           module: noop
     output: json
@@ -153,6 +157,9 @@ pipelines:
 	if profile.Chunk.Module != "generic" {
 		t.Fatalf("unexpected chunk binding: %+v", profile.Chunk)
 	}
+	if profile.Chunk.Retries != 2 {
+		t.Fatalf("chunk retries = %d, want 2", profile.Chunk.Retries)
+	}
 	if profile.Chunk.Options["size"] != 10 {
 		t.Fatalf("expected chunk options to preserve scalar, got %#v", profile.Chunk.Options)
 	}
@@ -168,6 +175,9 @@ pipelines:
 	if lane.Extract.Module != "fake/extract" || lane.Extract.LLMProfile != "fast" {
 		t.Fatalf("unexpected extract binding: %+v", lane.Extract)
 	}
+	if lane.Extract.Retries != 3 || lane.Merge.Retries != 1 {
+		t.Fatalf("unexpected retries: extract=%d merge=%d", lane.Extract.Retries, lane.Merge.Retries)
+	}
 	if lane.Extract.Options["temperature"] != 0 {
 		t.Fatalf("expected object options, got %#v", lane.Extract.Options)
 	}
@@ -224,6 +234,10 @@ pipelines:
         references:
           roster: ./legacy-roster.yml
           lore: ./lore.md
+        merge:
+          module: appendorder
+          references:
+            " merge_notes ": " ./merge.md "
         normalize:
           module: noop
           references:
@@ -246,6 +260,9 @@ pipelines:
 	if !reflect.DeepEqual(lane.Extract.References, wantExtract) {
 		t.Fatalf("extract references = %#v, want legacy merged with extract override %#v", lane.Extract.References, wantExtract)
 	}
+	if !reflect.DeepEqual(lane.Merge.References, map[string]string{"merge_notes": "./merge.md"}) {
+		t.Fatalf("merge references = %#v, want trimmed map", lane.Merge.References)
+	}
 	if !reflect.DeepEqual(lane.Normalize.References, map[string]string{"normalization_notes": "./normalization.md"}) {
 		t.Fatalf("normalize references = %#v, want trimmed map", lane.Normalize.References)
 	}