feat(cache): 建立字典缓存快照（T-103）

mapping/health_record_test.go

@@ -68,6 +68,26 @@ func TestMapHealthRecordUsesInjectedDictSnapshot(t *testing.T) {
 	}
 }
 
+func TestMapHealthRecordUsesMasterDataLookupWhenCodesMissing(t *testing.T) {
+	src := validPHISHealthRecord()
+	src.RegionCode = ""
+	src.ManaDoctorID = ""
+	src.ManaUnitID = ""
+	src.RegionName = "测试网格"
+	src.ManaDoctorName = "测试医生"
+	src.ManaUnitName = "测试机构"
+
+	got, errs := MapHealthRecord(src, MapContext{
+		Dicts:      DefaultDictSnapshot(),
+		MasterData: fakeMasterDataLookup{},
+	})
+	if len(errs) != 0 {
+		t.Fatalf("errors = %#v", errs)
+	}
+	if got.RegionCode != "441625000000" || got.ManaDoctorID != "doc-001" || got.ManaUnitID != "123456789" {
+		t.Fatalf("master data not resolved: %#v", got)
+	}
+}
 func TestGenerateCheckIDIsDeterministicAndVersionSensitive(t *testing.T) {
 	first := GenerateCheckID("PHIS", "JKDA", "record-001", "20260707010101")
 	second := GenerateCheckID("PHIS", "JKDA", "record-001", "20260707010101")
@@ -83,6 +103,19 @@ func TestGenerateCheckIDIsDeterministicAndVersionSensitive(t *testing.T) {
 	}
 }
 
+type fakeMasterDataLookup struct{}
+
+func (fakeMasterDataLookup) RegionCodeByName(name string) (string, bool) {
+	return map[string]string{"测试网格": "441625000000"}[name], name == "测试网格"
+}
+
+func (fakeMasterDataLookup) DoctorIDByName(name string) (string, bool) {
+	return map[string]string{"测试医生": "doc-001"}[name], name == "测试医生"
+}
+
+func (fakeMasterDataLookup) ManaUnitIDByName(name string) (string, bool) {
+	return map[string]string{"测试机构": "123456789"}[name], name == "测试机构"
+}
 func validPHISHealthRecord() PHISHealthRecord {
 	return PHISHealthRecord{
 		SourceSystem:      "PHIS",