Refactor event processing in tests for chronological order

- Updated test files to collect events first and sort them by their CreatedAt timestamp before processing, ensuring events are handled in chronological order.
- Removed redundant error checks for scanner errors after event processing.
- Enhanced clarity and maintainability of event handling in tests across multiple files, including export, fetch, and query tests.
- Adjusted expected index counts in tests to reflect changes in event structure and processing logic.

pkg/database/query-events-multiple-param-replaceable_test.go

@@ -146,23 +146,16 @@ func TestMultipleParameterizedReplaceableEvents(t *testing.T) {
 			Ids: tag.NewFromBytesSlice(baseEvent.ID),
 		},
 	)
-	if err == nil {
-		t.Fatalf("found base event by ID: %v", err)
+	if err != nil {
+		t.Fatalf("Failed to query for base event by ID: %v", err)
 	}
 
-	// // Verify we can still get the base event when querying by ID
-	// if len(evs) != 1 {
-	// 	t.Fatalf(
-	// 		"Expected 1 event when querying for base event by ID, got %d",
-	// 		len(evs),
-	// 	)
-	// }
-	//
-	// // Verify it's the base event
-	// if !utils.FastEqual(evs[0].ID, baseEvent.ID) {
-	// 	t.Fatalf(
-	// 		"Event ID doesn't match when querying for base event by ID. Got %x, expected %x",
-	// 		evs[0].ID, baseEvent.ID,
-	// 	)
-	// }
+	// Verify we get 0 events when querying for the base event by ID
+	// This is correct behavior for parameterized replaceable events - older events are replaced
+	if len(evs) != 0 {
+		t.Fatalf(
+			"Expected 0 events when querying for replaced base event by ID, got %d",
+			len(evs),
+		)
+	}
 }