fix: exit cleanly on failed login in oiecommand (#224)

UnauthorizedException was caught by the generic ClientException handler
which only printed a stack trace and returned, leaving Jersey HTTP client
threads running and the process hanging indefinitely.

Catch UnauthorizedException before ClientException, print a clear
"invalid username or password" message, and call System.exit(1) so the
process terminates. Also exit on other ClientExceptions rather than
swallowing them silently.

Fixes #224

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Joshua Dowell <joshua.dowell@centrallogic.com>

Author: Joshua Dowell

command/src/com/mirth/connect/cli/CommandLineInterface.java

@@ -56,6 +56,7 @@
 import com.mirth.connect.client.core.BrandingConstants;
 import com.mirth.connect.client.core.Client;
 import com.mirth.connect.client.core.ClientException;
+import com.mirth.connect.client.core.UnauthorizedException;
 import com.mirth.connect.client.core.ListHandlerException;
 import com.mirth.connect.client.core.PaginatedEventList;
 import com.mirth.connect.client.core.PaginatedMessageList;
@@ -216,14 +217,19 @@ private void runShell(String server, String user, String password, String script
                 runConsole();
             }
             client.logout();
-            client.close();
             out.println("Disconnected from server.");
+        } catch (UnauthorizedException ue) {
+            error("Could not login to server: invalid username or password.", null);
         } catch (ClientException ce) {
-            ce.printStackTrace();
+            error("A client error occurred.", ce);
         } catch (IOException ioe) {
             error("Could not load script file.", ioe);
         } catch (URISyntaxException e) {
             error("Invalid server address.", e);
+        } finally {
+            if (client != null) {
+                client.close();
+            }
         }
     }