Record graph error (#2195)

## Description

Record information about the error Graph returned if something went wrong when fetching an item.

## 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

- [ ] 🌻 Feature
- [x] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Test
- [ ] 💻 CI/Deployment
- [x] 🧹 Tech Debt/Cleanup

## Issue(s)

* closes #2194

## Test Plan

- [x] 💪 Manual
- [ ] ⚡ Unit test
- [ ] 💚 E2E

src/internal/connector/exchange/exchange_data_collection.go

@@ -198,14 +198,6 @@ func (col *Collection) streamItems(ctx context.Context) {
 	semaphoreCh := make(chan struct{}, urlPrefetchChannelBufferSize)
 	defer close(semaphoreCh)
 
-	updaterMu := sync.Mutex{}
-	errUpdater := func(user string, err error) {
-		updaterMu.Lock()
-		defer updaterMu.Unlock()
-
-		errs = support.WrapAndAppend(user, err, errs)
-	}
-
 	// delete all removed items
 	for id := range col.removed {
 		semaphoreCh <- struct{}{}
@@ -231,6 +223,14 @@ func (col *Collection) streamItems(ctx context.Context) {
 		}(id)
 	}
 
+	updaterMu := sync.Mutex{}
+	errUpdater := func(user string, err error) {
+		updaterMu.Lock()
+		defer updaterMu.Unlock()
+
+		errs = support.WrapAndAppend(user, err, errs)
+	}
+
 	// add any new items
 	for id := range col.added {
 		if col.ctrl.FailFast && errs != nil {
@@ -273,7 +273,7 @@ func (col *Collection) streamItems(ctx context.Context) {
 					return
 				}
 
-				errUpdater(user, err)
+				errUpdater(user, support.ConnectorStackErrorTraceWrap(err, "fetching item"))
 
 				return
 			}