fix odin syntax

rocksdb_shim/rocksdb_shim.cc

@@ -0,0 +1,22 @@
+// TODO: In order to use RocksDB's WAL replication helpers, we need to import the C++ library so we use this shim
+/**
+	C++ shim implementation notes (the important bits)
+
+	In this rocksdb_shim.cc we'll need to use:
+
+	rocksdb::DB::Open(...)
+
+	db->GetLatestSequenceNumber()
+
+	db->GetUpdatesSince(seq, &iter)
+
+	from each TransactionLogIterator entry:
+
+	get WriteBatch and serialize via WriteBatch::Data()
+
+	apply via rocksdb::WriteBatch wb(data); db->Write(write_options, &wb);
+
+	Also we must configure WAL retention so the followers don’t fall off the end. RocksDB warns the iterator can become invalid if WAL is cleared aggressively; typical controls are WAL TTL / size limit.
+
+	https://github.com/facebook/rocksdb/issues/1565
+ */