revert(import): restore original duplicate-by-ARN blocking behavior

Bug 6 is not a bug — blocking re-imports of the same cloud resource
ARN is correct because allowing it would create duplicate CFN logical
resources referencing the same physical resource, causing deploy
failures. Reverts the --name re-import allowance while keeping the
Bug 5 early name validation fix.

Author: aidandaly24

src/cli/commands/import/import-memory.ts

@@ -222,21 +222,16 @@ export async function handleImportMemory(options: ImportResourceOptions): Promis
     const targetName = target.name ?? 'default';
     const existingResource = await findResourceInDeployedState(ctx.configIO, targetName, 'memory', memoryId);
     if (existingResource) {
-      if (!options.name) {
-        const error = `Memory "${memoryId}" is already imported in this project as "${existingResource}". Remove it first before re-importing, or use --name to import under a different name.`;
-        logger.endStep('error', error);
-        logger.finalize(false);
-        return {
-          success: false,
-          error,
-          resourceType: 'memory',
-          resourceName: localName,
-          logPath: logger.getRelativeLogPath(),
-        };
-      }
-      onProgress(
-        `Warning: Memory "${memoryId}" already imported as "${existingResource}". Re-importing as "${localName}".`
-      );
+      const error = `Memory "${memoryId}" is already imported in this project as "${existingResource}". Remove it first before re-importing.`;
+      logger.endStep('error', error);
+      logger.finalize(false);
+      return {
+        success: false,
+        error,
+        resourceType: 'memory',
+        resourceName: localName,
+        logPath: logger.getRelativeLogPath(),
+      };
     }
     logger.endStep('success');
 

src/cli/commands/import/import-runtime.ts

@@ -318,21 +318,16 @@ export async function handleImportRuntime(options: ImportResourceOptions): Promi
     const targetName = target.name ?? 'default';
     const existingResource = await findResourceInDeployedState(ctx.configIO, targetName, 'runtime', runtimeId);
     if (existingResource) {
-      if (!options.name) {
-        const error = `Runtime "${runtimeId}" is already imported in this project as "${existingResource}". Remove it first before re-importing, or use --name to import under a different name.`;
-        logger.endStep('error', error);
-        logger.finalize(false);
-        return {
-          success: false,
-          error,
-          resourceType: 'runtime',
-          resourceName: localName,
-          logPath: logger.getRelativeLogPath(),
-        };
-      }
-      onProgress(
-        `Warning: Runtime "${runtimeId}" already imported as "${existingResource}". Re-importing as "${localName}".`
-      );
+      const error = `Runtime "${runtimeId}" is already imported in this project as "${existingResource}". Remove it first before re-importing.`;
+      logger.endStep('error', error);
+      logger.finalize(false);
+      return {
+        success: false,
+        error,
+        resourceType: 'runtime',
+        resourceName: localName,
+        logPath: logger.getRelativeLogPath(),
+      };
     }
     logger.endStep('success');