fix: prevent cleanup exceptions from marking successful deployments as failed

Fixes #7439 where successful deployments were being marked as FAILED due to exceptions during old container cleanup.

Root cause: Commit 97550f406 wrapped stop_running_container() in try-catch that re-throws ALL exceptions as DeploymentException. When old containers are already removed (a common scenario), the "No such container" error propagates and marks successful deployments as failed.

Solution: Check if deployment has already succeeded (newVersionIsHealthy || force) before re-throwing exceptions from cleanup operations. Cleanup failures are logged but don't fail the deployment.

- Add conditional handling in stop_running_container() catch block
- Log cleanup warnings with hidden: true to avoid UI clutter
- Only re-throw exceptions if deployment hasn't succeeded yet
- Preserves backward compatibility and expected behavior

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app/Jobs/ApplicationDeploymentJob.php

@@ -3187,6 +3187,19 @@ private function stop_running_container(bool $force = false)
                 $this->graceful_shutdown_container($this->container_name);
             }
         } catch (Exception $e) {
+            // If new version is healthy, this is just cleanup - don't fail the deployment
+            if ($this->newVersionIsHealthy || $force) {
+                $this->application_deployment_queue->addLogEntry(
+                    "Warning: Could not remove old container: {$e->getMessage()}",
+                    'stderr',
+                    hidden: true
+                );
+                \Log::warning("Failed to stop running container {$this->container_name}: {$e->getMessage()}");
+
+                return; // Don't re-throw - cleanup failures shouldn't fail successful deployments
+            }
+
+            // Only re-throw if deployment hasn't succeeded yet
             throw new DeploymentException("Failed to stop running container: {$e->getMessage()}", $e->getCode(), $e);
         }
     }