Add Policy DSL Validator, Schema Exporter, and Simulation Smoke tools

- Implemented PolicyDslValidator with command-line options for strict mode and JSON output.
- Created PolicySchemaExporter to generate JSON schemas for policy-related models.
- Developed PolicySimulationSmoke tool to validate policy simulations against expected outcomes.
- Added project files and necessary dependencies for each tool.
- Ensured proper error handling and usage instructions across tools.

samples/api/scheduler/graph-overlay-job.json

@@ -0,0 +1,21 @@
+{
+  "schemaVersion": "scheduler.graph-overlay-job@1",
+  "id": "goj_20251026a",
+  "tenantId": "tenant-alpha",
+  "graphSnapshotId": "graph_snap_20251026",
+  "buildJobId": "gbj_20251026a",
+  "overlayKind": "policy",
+  "overlayKey": "policy@2025-10-01",
+  "subjects": [
+    "artifact:service-api",
+    "artifact:service-worker"
+  ],
+  "status": "queued",
+  "trigger": "policy",
+  "attempts": 0,
+  "correlationId": "policy_run_321",
+  "createdAt": "2025-10-26T12:05:00+00:00",
+  "metadata": {
+    "policyRunId": "policy_run_321"
+  }
+}