fix: log full exception in uv workspace discovery failure

Use LOG.log(Level.WARNING, msg, e) instead of LOG.warning(msg +
e.getMessage()) so the stack trace is preserved for diagnosability.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Strum355

src/main/java/io/github/guacsec/trustifyda/impl/ExhortApi.java

@@ -69,6 +69,7 @@
 import java.util.concurrent.CompletionException;
 import java.util.function.Function;
 import java.util.function.Supplier;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.stream.Collectors;
 import org.tomlj.TomlArray;
@@ -1021,7 +1022,7 @@ private List<Path> discoverUvWorkspaceMembers(Path workspaceDir, Set<String> ign
 
       return WorkspaceUtils.filterByIgnorePatterns(workspaceDir, manifests, ignorePatterns);
     } catch (Exception e) {
-      LOG.warning("Failed to discover uv workspace members: " + e.getMessage());
+      LOG.log(Level.WARNING, "Failed to discover uv workspace members", e);
       return Collections.emptyList();
     }
   }