feat: implement service-automation with plugin-based DAG flow engine

- AutomationEngine core class (DAG execution, NodeExecutor/Trigger interfaces)
- AutomationServicePlugin (kernel plugin wrapping engine as 'automation' service)
- CrudNodesPlugin (get/create/update/delete_record)
- LogicNodesPlugin (decision/assignment/loop)
- HttpConnectorPlugin (http_request/connector_action)
- 27 comprehensive tests (all passing)
- Updated ROADMAP.md

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

ROADMAP.md

@@ -317,13 +317,13 @@ business/custom objects, aligning with industry best practices (e.g., ServiceNow
 
 | Contract | Priority | Package | Notes |
 |:---|:---:|:---|:---|
-| `IAutomationService` | **P2** | `@objectstack/service-automation` | Flow execution engine |
+| `IAutomationService` | **P2** | `@objectstack/service-automation` | ✅ Plugin-based DAG flow engine (MVP) |
 | `IWorkflowService` | **P2** | `@objectstack/service-workflow` | State machine + approval processes |
 | `IGraphQLService` | **P2** | `@objectstack/service-graphql` | Auto-generated GraphQL from objects |
 | `IAIService` | **P2** | `@objectstack/service-ai` | LLM integration (OpenAI/Anthropic/local) |
 | `IAnalyticsService` | **P3** | `@objectstack/service-analytics` | BI/OLAP queries |
 
-- [ ] `service-automation` — Implement `IAutomationService` with flow execution engine
+- [x] `service-automation` — Implement `IAutomationService` with plugin-based DAG flow engine (MVP: CRUD/Logic/HTTP nodes)
 - [ ] `service-workflow` — Implement `IWorkflowService` with state machine runtime
 - [ ] `service-graphql` — Implement `IGraphQLService` with auto-schema generation
 - [ ] `service-ai` — Implement `IAIService` with multi-provider LLM routing
@@ -573,7 +573,7 @@ Final polish and advanced features.
 | 15 | Search Service | `ISearchService` | ❌ | `@objectstack/service-search` (planned) | Spec only |
 | 16 | Notification Service | `INotificationService` | ❌ | `@objectstack/service-notification` (planned) | Spec only |
 | 17 | AI Service | `IAIService` | ❌ | `@objectstack/service-ai` (planned) | Spec only |
-| 18 | Automation Service | `IAutomationService` | ❌ | `@objectstack/service-automation` (planned) | Spec only |
+| 18 | Automation Service | `IAutomationService` | ✅ | `@objectstack/service-automation` | Plugin-based DAG engine (MVP) |
 | 19 | Workflow Service | `IWorkflowService` | ❌ | `@objectstack/service-workflow` (planned) | Spec only |
 | 20 | GraphQL Service | `IGraphQLService` | ❌ | `@objectstack/service-graphql` (planned) | Spec only |
 | 21 | i18n Service | `II18nService` | ✅ | `@objectstack/service-i18n` | File-based locale loading |

packages/services/service-automation/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "@objectstack/service-automation",
+  "version": "3.0.7",
+  "license": "Apache-2.0",
+  "description": "Automation Service for ObjectStack — implements IAutomationService with plugin-based DAG flow execution engine",
+  "type": "module",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.mjs",
+      "require": "./dist/index.js"
+    }
+  },
+  "scripts": {
+    "build": "tsup --config ../../../tsup.config.ts",
+    "test": "vitest run"
+  },
+  "dependencies": {
+    "@objectstack/core": "workspace:*",
+    "@objectstack/spec": "workspace:*"
+  },
+  "devDependencies": {
+    "typescript": "^5.0.0",
+    "vitest": "^4.0.18",
+    "@types/node": "^25.2.3"
+  }
+}