Update DEVELOPER_GUIDE.md

exp/services/ledgerexporter/DEVELOPER_GUIDE.md

@@ -17,7 +17,9 @@ To achieve its goals, the ledger exporter uses the following architecture, which
 - Export manager to bundles and organizes the ledgers to get them ready for export
 - The cloud storage plugin writes to the cloud storage. This is specific to the type of cloud storage, GCS in this case.
 
-[Insert Architecture diagram here]
+
+![ledgerexporter-architecture](https://github.com/urvisavla/go/assets/30014929/8fcc4733-6e35-4de7-ad06-0a27515364cd)
+
 
 ## Data Format
 - Ledger exporter uses a compact and efficient data format called XDR (External Data Representation), which is a compact binary format. The captive-core emits data in this format and the data structure is referred to as `LedgerCloseMeta`. The exporter bundle multiple LedgerCloseMeta's into a single object using a custom XDR struct called LedgerCloseMetaBatch which is defined in [Stellar-exporter.x](https://github.com/stellar/go/blob/master/xdr/Stellar-exporter.x).