fix(cubejs-cli): Fix validate command (#9666)

Author: KSDaemon

packages/cubejs-cli/src/command/validate.ts

@@ -21,7 +21,7 @@ async function validate(options) {
     });
   } catch (error: any) {
     console.log('❌ Cube Schema validation failed');
-    displayError(error.messages);
+    displayError(error.messages || error.message);
     return;
   }
 

packages/cubejs-schema-compiler/src/compiler/DataSchemaCompiler.js

@@ -546,8 +546,9 @@ export class DataSchemaCompiler {
   // Alias "securityContext" with "security_context" (snake case version)
   // to support snake case based data models
   cloneCompileContextWithGetterAlias(compileContext) {
-    const clone = R.clone(compileContext || {});
-    clone.security_context = compileContext.securityContext;
+    const ctx = compileContext || {};
+    const clone = R.clone(ctx);
+    clone.security_context = ctx.securityContext;
     return clone;
   }