Cleaning up initial commit and restructured some of the execution flow, fixed returns and reference mgmt

include/module_interface.hpp

@@ -1,12 +1,29 @@
 #pragma once
 #include <string>
+#include <vector>
 
 /*
  *  Provides reserved symbol names we look for in modules.
  */
 
+// Define required symbols in one place
+namespace module_interface {
+    // This is the single source of truth for required module symbols
+    static const std::vector<std::string> required_symbols = {
+        "dpm_module_execute",
+        "dpm_module_get_version",
+        "dpm_get_description"
+    };
+}
+
 // Common interface for all DPM modules
 extern "C" {
     // Module must export this symbol to be considered valid
     int dpm_module_execute(const char* command, int argc, char** argv);
+
+    // Module version information
+    const char* dpm_module_get_version(void);
+
+    // Module description information
+    const char* dpm_get_description(void);
 }