Add shortref and rename item_id (#4868)

<!-- PR description-->

---

#### Does this PR need a docs update or release note?

- [ ] ✅ Yes, it's included
- [ ] 🕐 Yes, but in a later PR
- [x] ⛔ No

#### Type of change

<!--- Please check the type of change your PR introduces: --->
- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Supportability/Tests
- [ ] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup

#### Issue(s)

<!-- Can reference multiple issues. Use one of the following "magic words" - "closes, fixes" to auto-close the Github issue. -->
* #<issue>

#### Test Plan

<!-- How will this be tested prior to merging.-->
- [ ] 💪 Manual
- [ ] ⚡ Unit test
- [ ] 💚 E2E

src/internal/converters/eml/eml.go

@@ -44,7 +44,7 @@ func FromJSON(ctx context.Context, body []byte) (string, error) {
 		return "", clues.Wrap(err, "converting to messageble")
 	}
 
-	ctx = clues.Add(ctx, "id", ptr.Val(data.GetId()))
+	ctx = clues.Add(ctx, "item_id", ptr.Val(data.GetId()))
 
 	email := mail.NewMSG()
 	email.AllowDuplicateAddress = true // More "correct" conversion

src/internal/m365/collection/exchange/export.go

@@ -44,7 +44,9 @@ func streamItems(
 	errs := fault.New(false)
 
 	for _, rc := range drc {
-		for item := range rc.Items(ctx, errs) {
+		ictx := clues.Add(ctx, "path_short_ref", rc.FullPath().ShortRef())
+
+		for item := range rc.Items(ictx, errs) {
 			id := item.ID()
 			name := id + ".eml"
 
@@ -64,7 +66,7 @@ func streamItems(
 				continue
 			}
 
-			email, err := eml.FromJSON(ctx, content)
+			email, err := eml.FromJSON(ictx, content)
 			if err != nil {
 				ch <- export.Item{
 					ID:    id,

src/internal/m365/service/exchange/export_test.go

@@ -33,6 +33,10 @@ func TestExportUnitSuite(t *testing.T) {
 func (suite *ExportUnitSuite) TestGetItems() {
 	emailBodyBytes := []byte(testdata.EmailWithAttachments)
 
+	pb := path.Builder{}.Append("Inbox")
+	p, err := pb.ToDataLayerPath("t", "r", path.ExchangeService, path.EmailCategory, false)
+	assert.NoError(suite.T(), err, "build path")
+
 	table := []struct {
 		name              string
 		version           int
@@ -44,6 +48,7 @@ func (suite *ExportUnitSuite) TestGetItems() {
 			version: 1,
 			backingCollection: data.NoFetchRestoreCollection{
 				Collection: dataMock.Collection{
+					Path: p,
 					ItemData: []data.Item{
 						&dataMock.Item{
 							ItemID: "id1",
@@ -65,6 +70,7 @@ func (suite *ExportUnitSuite) TestGetItems() {
 			version: 1,
 			backingCollection: data.NoFetchRestoreCollection{
 				Collection: dataMock.Collection{
+					Path: p,
 					ItemData: []data.Item{
 						&dataMock.Item{
 							ItemID: "id1",
@@ -95,6 +101,7 @@ func (suite *ExportUnitSuite) TestGetItems() {
 			version: version.Groups9Update,
 			backingCollection: data.FetchRestoreCollection{
 				Collection: dataMock.Collection{
+					Path: p,
 					ItemData: []data.Item{
 						&dataMock.Item{
 							ItemID: "id0",