fix: add TestResult enum to header (was in .cpp but missing from .h)

Source/Plugin/PluginBridgeProcessor.h

@@ -53,6 +53,10 @@ public:
     bool isBlocked(const juce::String& path) const;
     Blocklist& getBlocklist() { return blocklist; }
 
+    // Test loading (uses Helper to test if plugin is safe)
+    enum class TestResult { Untested, Testing, Safe, Unsafe };
+    TestResult testPluginSafety(const juce::String& path);
+
     // Parameter access (for MCP server)
     struct ParamInfo {
         int index;