Refactor concurrency header to replace iosfwd with string and improve thread capture in initialiseMasterAsync

cpp/src/Public/sweepstore/concurrency.h

@@ -2,7 +2,7 @@
 
 #include <cstdint>
 #include <functional>
-#include <iosfwd>
+#include <string>
 #include <thread>
 
 #define STALE_HEARTBEAT_THRESHOLD_MS 5000
@@ -22,7 +22,7 @@ namespace SweepstoreConcurrency {
     void initialiseMaster(std::string filePath);
 
     inline void initialiseMasterAsync(std::string filePath) {
-        std::thread([&filePath]() {
+        std::thread([filePath]() {
             initialiseMaster(filePath);
         }).detach();
     }

cpp/src/Public/sweepstore/utils/helpers.h

@@ -9,6 +9,8 @@
 #include <fstream>
 #include <chrono>
 #include <thread>
+#include <cstring>
+#include <algorithm>
 
 // Toggleable debug printing via preprocessor
 #ifndef SWEEPSTORE_DEBUG