fix: retain conversation ownership across blank paragraphs

internal/logging/text.go

@@ -130,11 +130,8 @@ func redactConversationLines(body string) string {
 	lines := strings.SplitAfter(body, "\n")
 	hiding := false
 	for i, line := range lines {
-		trimmed := strings.TrimSpace(line)
-		if hiding && trimmed == "" {
-			hiding = false
-			continue
-		}
+		// Whitespace separates paragraphs inside a conversation, not records.
+		// Ownership ends only at the explicit non-conversation field below.
 		field := textFieldLine.FindStringSubmatch(line)
 		if hiding {
 			// Continuation lines and conversation speaker labels are not business

internal/logging/text_security_test.go

@@ -29,6 +29,31 @@ func TestAssociatedSensitiveControlsHideContentWithoutSwallowingBusiness(t *test
 	}
 }
 
+func TestConversationOwnershipPersistsAcrossBlankLines(t *testing.T) {
+	for _, gap := range []string{"\n", "\n\n", "\n \n\t\n", "\r\n\r\n"} {
+		for _, label := range []string{"messages", "prompt", "transcript", "content"} {
+			value := "upstream failed\n" + label + ":" + gap + "user: private-user-turn" + gap + "assistant: private-assistant-turn" + gap + "status=retry_pending\nattempts=2"
+			for _, debug := range []bool{false, true} {
+				out := installTestLogger(t, debug)
+				slog.Error("operation failed", "error", errors.New(value), "detail", value)
+				slog.Info(value, "stage", "failure_observed")
+				TextBody(t.Context(), "HTTP text observed", []byte(value), "transport", "http")
+				text := out.String()
+				for _, secret := range []string{"private-user-turn", "private-assistant-turn"} {
+					if strings.Contains(text, secret) {
+						t.Fatalf("label %s gap %q debug %v leak: %s", label, gap, debug, text)
+					}
+				}
+				for _, keep := range []string{"upstream failed", "retry_pending", "attempts=2"} {
+					if !strings.Contains(text, keep) {
+						t.Fatal("business diagnostics lost", text)
+					}
+				}
+			}
+		}
+	}
+}
+
 func TestFreeTextConversationIsHiddenInBothModesAndAllScalarPaths(t *testing.T) {
 	value := "upstream failed\nmessages:\nuser: private-user-turn\nassistant: private-assistant-turn\n\nstatus=retry_pending\nattempts=2"
 	for _, debug := range []bool{false, true} {
@@ -103,7 +128,7 @@ func TestReadableMarkupFormAndMultilineConversationAreSanitized(t *testing.T) {
 }
 
 func TestReadablePlainHTTPBodiesAreObservedSafelyWithoutChangingBytes(t *testing.T) {
-	body := "status=ready\ntask_id=4\nremaining=27\nAuthorization: Basic dXNlcjpwYXNzd29yZA==\napi_key=private-key\n-----BEGIN PRIVATE KEY-----\nprivate-pem-material\n-----END PRIVATE KEY-----\nretry_after=60\n" + strings.Repeat("business-data ", 12000)
+	body := "status=ready\ntask_id=4\nremaining=27\nmessages:\n\nuser: private-http-user-turn\n\nassistant: private-http-assistant-turn\n\nstatus=ready\nAuthorization: Basic dXNlcjpwYXNzd29yZA==\napi_key=private-key\n-----BEGIN PRIVATE KEY-----\nprivate-pem-material\n-----END PRIVATE KEY-----\nretry_after=60\n" + strings.Repeat("business-data ", 12000)
 	for _, debug := range []bool{false, true} {
 		out := installTestLogger(t, debug)
 		server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@@ -127,7 +152,7 @@ func TestReadablePlainHTTPBodiesAreObservedSafelyWithoutChangingBytes(t *testing
 			t.Fatal("response changed", err)
 		}
 		text := out.String()
-		for _, secret := range []string{"dXNlcjpwYXNzd29yZA==", "private-key", "private-pem-material"} {
+		for _, secret := range []string{"dXNlcjpwYXNzd29yZA==", "private-key", "private-pem-material", "private-http-user-turn", "private-http-assistant-turn"} {
 			if strings.Contains(text, secret) {
 				t.Fatalf("leak %s", secret)
 			}