feat(stock-lab): Screener 엔진 + combine + ScreenerResult + 노드 레지스트리

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

stock-lab/app/screener/registry.py

@@ -0,0 +1,24 @@
+"""Registry of node classes (single source of truth for /nodes endpoint)."""
+
+from .nodes.hygiene      import HygieneGate
+from .nodes.foreign_buy  import ForeignBuy
+from .nodes.volume_surge import VolumeSurge
+from .nodes.momentum     import Momentum20
+from .nodes.high52w      import High52WProximity
+from .nodes.rs_rating    import RsRating
+from .nodes.ma_alignment import MaAlignment
+from .nodes.vcp_lite     import VcpLite
+
+NODE_REGISTRY: dict = {
+    "foreign_buy":  ForeignBuy,
+    "volume_surge": VolumeSurge,
+    "momentum":     Momentum20,
+    "high52w":      High52WProximity,
+    "rs_rating":    RsRating,
+    "ma_alignment": MaAlignment,
+    "vcp_lite":     VcpLite,
+}
+
+GATE_REGISTRY: dict = {
+    "hygiene": HygieneGate,
+}