feat(crawler): add python pixelrag capture worker

tests/test_pixelrag_crawler_integration_service.py

@@ -302,3 +302,40 @@ def test_pixelrag_capture_worker_rejects_wrong_platform_host(tmp_path):
     payload = json.loads(completed.stdout)
     assert payload["status"] == "rejected"
     assert any("not allowed for platform momo" in error for error in payload["errors"])
+
+
+def test_pixelrag_python_capture_worker_dry_run_plans_artifact_outputs(tmp_path):
+    from services.pixelrag_crawler_integration_service import (
+        build_pixelrag_visual_evidence_manifest,
+    )
+
+    manifest = build_pixelrag_visual_evidence_manifest(
+        url="https://24h.pchome.com.tw/",
+        platform="pchome",
+        crawler="PChomeCrawler.visual_fallback",
+        trigger_reason="parser_empty",
+        page_size={"width": 1024, "height": 1024},
+        tile_size={"width": 512, "height": 512},
+    )
+    completed = subprocess.run(
+        [
+            sys.executable,
+            "scripts/ops/capture_pixelrag_visual_evidence.py",
+            "--manifest-json",
+            json.dumps(manifest),
+            "--output-dir",
+            str(tmp_path),
+            "--dry-run",
+        ],
+        capture_output=True,
+        check=False,
+        text=True,
+    )
+
+    assert completed.returncode == 0
+    payload = json.loads(completed.stdout)
+    assert payload["policy"] == "read_only_pixelrag_visual_capture_artifact_v1"
+    assert payload["status"] == "dry_run_ready"
+    assert payload["controlled_apply"]["artifact_write"] is False
+    assert payload["tile_plan"]["planned_tile_count"] == 4
+    assert payload["capture_target"]["platform"] == "pchome"