feat(osi): 某人全部体检查询 JKTJ00002（T-306）

- osi.QueryHealthChecks（/auto/jktj/query，返回全部体检数组）
- contract.HealthCheckRecordSummary：驼峰 idCard（≠最近一次小写 idcard）、checkId 可空
- HTTP 端点 GET /api/health-check/all
- 单测含 null checkId 场景；实测端点已部署

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

osi/jktj_test.go

@@ -44,6 +44,43 @@ func TestLastHealthCheckDecodesSummaryAndHitsPath(t *testing.T) {
 	}
 }
 
+func TestQueryHealthChecksDecodesArrayAndHitsPath(t *testing.T) {
+	var seenPath string
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		seenPath = r.URL.Path
+		w.Header().Set("Content-Type", "application/json")
+		// data 为数组=某人全部体检；idCard 驼峰；历史记录 checkId 为 null（脱敏假数据）
+		_, _ = w.Write([]byte(`{"code":"01","message":"操作成功","data":[` +
+			`{"checkId":"CHK-1","checkDate":"2025-06-23","idCard":"TEST-ID","personName":"测试"},` +
+			`{"checkId":null,"checkDate":"2013-06-07","idCard":"TEST-ID","personName":"测试"}]}`))
+	}))
+	defer server.Close()
+
+	transport, err := NewTransport(TransportConfig{Timeout: time.Second})
+	if err != nil {
+		t.Fatalf("NewTransport: %v", err)
+	}
+	client := NewClient(ClientConfig{BaseURL: server.URL, UserName: "u", Ask: "k", Transport: transport})
+
+	records, result, err := client.QueryHealthChecks(context.Background(), FindHealthCheckQuery{IDCard: "TEST-ID"})
+	if err != nil {
+		t.Fatalf("QueryHealthChecks: %v", err)
+	}
+	if seenPath != "/osi/api/auto/jktj/query" {
+		t.Fatalf("path = %q", seenPath)
+	}
+	if !result.Success || len(records) != 2 {
+		t.Fatalf("records = %d result = %#v", len(records), result)
+	}
+	// 驼峰 idCard 应解出；历史记录 null checkId 解为空串且不报错
+	if records[0].CheckID != "CHK-1" || records[0].IDCard != "TEST-ID" {
+		t.Fatalf("row0 = %#v", records[0])
+	}
+	if records[1].CheckID != "" || records[1].CheckDate != "2013-06-07" {
+		t.Fatalf("row1 (null checkId) = %#v", records[1])
+	}
+}
+
 func TestListHealthCheckPeopleDecodesRosterAndHitsPath(t *testing.T) {
 	var seenPath string
 	var seenBody map[string]any