core(deploy): add deployedConfigSnapshot field to Deployment model

Appends DeploymentConfigSnapshot deployedConfigSnapshot to the Deployment
record and adds a matching withDeployedConfigSnapshot wither. All
positional call sites (repository mapper, test fixture) updated to pass
null; Task 1.4 will wire real persistence and Task 1.5 will populate
the field on RUNNING transition.

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

cameleer-server-core/src/main/java/com/cameleer/server/core/runtime/Deployment.java

@@ -19,6 +19,7 @@ public record Deployment(
         String containerName,
         String errorMessage,
         Map<String, Object> resolvedConfig,
+        DeploymentConfigSnapshot deployedConfigSnapshot,
         Instant deployedAt,
         Instant stoppedAt,
         Instant createdAt
@@ -27,6 +28,13 @@ public record Deployment(
         return new Deployment(id, appId, appVersionId, environmentId, newStatus,
                 targetState, deploymentStrategy, replicaStates, deployStage,
                 containerId, containerName, errorMessage, resolvedConfig,
-                deployedAt, stoppedAt, createdAt);
+                deployedConfigSnapshot, deployedAt, stoppedAt, createdAt);
+    }
+
+    public Deployment withDeployedConfigSnapshot(DeploymentConfigSnapshot snapshot) {
+        return new Deployment(id, appId, appVersionId, environmentId, status,
+                targetState, deploymentStrategy, replicaStates, deployStage,
+                containerId, containerName, errorMessage, resolvedConfig,
+                snapshot, deployedAt, stoppedAt, createdAt);
     }
 }