db/simple/Directory: add LookupResult::uri

src/db/plugins/simple/Directory.hxx

@@ -182,6 +182,11 @@ public:
 		 */
 		Directory *directory;
 
+		/**
+		 * The URI part which resolved to the #directory.
+		 */
+		std::string_view uri;
+
 		/**
 		 * The remaining URI part (without leading slash) or
 		 * nullptr if the given URI was consumed completely.