feat: add timestamp to grpc

applications/minotari_app_grpc/proto/base_node.proto

@@ -339,10 +339,11 @@ message MetaData {
     uint64 best_block_height = 1;
     // The block hash of the current tip of the longest valid chain, or `None` for an empty chain
     bytes best_block_hash = 2;
-    // This is the min height this node can provide complete blocks for. A 0 here means this node is archival and can provide complete blocks for every height.
-    uint64 pruned_height = 6;
     // The current geometric mean of the pow of the chain tip, or `None` if there is no chain
     bytes accumulated_difficulty = 5;
+    // This is the min height this node can provide complete blocks for. A 0 here means this node is archival and can provide complete blocks for every height.
+    uint64 pruned_height = 6;
+    uint64 timestamp = 7;
 }
 
 message SyncInfoResponse {

applications/minotari_app_grpc/src/conversions/chain_metadata.rs

@@ -33,6 +33,7 @@ impl From<ChainMetadata> for grpc::MetaData {
             best_block_hash: meta.best_block_hash().to_vec(),
             pruned_height: meta.pruned_height(),
             accumulated_difficulty: diff.to_vec(),
+            timestamp: meta.timestamp(),
         }
     }
 }