Fix OpenCL detection to handle already-initialized state

When CL.create() throws IllegalStateException with 'already been created',
treat this as OpenCL being available rather than NOT_AVAILABLE.

Author: Hellblazer

gpu-test-framework/src/main/java/com/hellblazer/gpu/test/support/TestSupportMatrix.java

@@ -117,12 +117,26 @@ private boolean detectCIEnvironment() {
     }
 
     private void detectBackendSupport() {
-        // OpenCL detection
+        // OpenCL detection - handle already-initialized state correctly
+        // Note: We do NOT destroy CL after detection because subsequent code may need it
         try {
-            CL.create();
+            try {
+                CL.create();
+                log.debug("OpenCL initialized successfully");
+            } catch (IllegalStateException e) {
+                // "OpenCL has already been created" means it's available
+                if (e.getMessage() != null && e.getMessage().contains("already been created")) {
+                    log.debug("OpenCL already initialized - treating as available");
+                } else {
+                    throw e; // Re-throw other IllegalStateExceptions
+                }
+            }
+
+            // OpenCL is available (either we created it or it was already created)
             backendSupport.put(Backend.OPENCL, ciEnvironment ? SupportLevel.MOCK : SupportLevel.FULL);
         } catch (Throwable t) {
-            backendSupport.put(Backend.OPENCL, 
+            log.debug("OpenCL not available: {}", t.getMessage());
+            backendSupport.put(Backend.OPENCL,
                 ciEnvironment ? SupportLevel.MOCK : SupportLevel.NOT_AVAILABLE);
         }