feat(stock-lab): /nodes + /settings 라우터 + main.py include

- screener/router.py: APIRouter prefix=/api/stock/screener
  - GET /nodes: NODE_REGISTRY + GATE_REGISTRY 메타 노출 (7 score + 1 gate)
  - GET /settings: screener_settings 싱글톤 row 조회
  - PUT /settings: 가중치/노드/게이트 파라미터 round-trip
- main.py: screener_router include (FastAPI 생성 직후)
- db.py: STOCK_DB_PATH 환경변수 지원 (테스트 격리, 기본값 /app/data/stock.db 유지)
- test_screener_router.py: 3 tests (nodes list, settings GET, PUT round-trip)

stock-lab/app/db.py

@@ -5,11 +5,14 @@ from typing import List, Dict, Any, Optional
 
 from app.screener.schema import ensure_screener_schema
 
-DB_PATH = "/app/data/stock.db"
+DB_PATH = os.environ.get("STOCK_DB_PATH", "/app/data/stock.db")
 
 def _conn() -> sqlite3.Connection:
-    os.makedirs(os.path.dirname(DB_PATH), exist_ok=True)
+    db_path = os.environ.get("STOCK_DB_PATH", DB_PATH)
-    conn = sqlite3.connect(DB_PATH)
+    parent = os.path.dirname(db_path)
+    if parent:
+        os.makedirs(parent, exist_ok=True)
+    conn = sqlite3.connect(db_path)
     conn.row_factory = sqlite3.Row
     return conn
 

stock-lab/app/main.py

@@ -27,6 +27,10 @@ from .ai_summarizer import summarize_news, OllamaError
 
 app = FastAPI()
 
+# Screener 라우터 등록
+from app.screener.router import router as screener_router
+app.include_router(screener_router)
+
 # CORS 설정 (프론트엔드 접근 허용)
 _cors_origins = os.getenv("CORS_ALLOW_ORIGINS", "http://localhost:3007,http://localhost:8080").split(",")
 app.add_middleware(

stock-lab/app/screener/router.py

@@ -0,0 +1,85 @@
+"""FastAPI router for /api/stock/screener/*"""
+
+from __future__ import annotations
+
+import datetime as dt
+import json
+import os
+import sqlite3
+
+from fastapi import APIRouter, HTTPException
+
+from . import schemas
+from .registry import NODE_REGISTRY, GATE_REGISTRY
+
+
+router = APIRouter(prefix="/api/stock/screener")
+
+
+def _db_path() -> str:
+    return os.environ.get("STOCK_DB_PATH", "/app/data/stock.db")
+
+
+def _conn() -> sqlite3.Connection:
+    return sqlite3.connect(_db_path())
+
+
+# ---------- /nodes ----------
+
+@router.get("/nodes", response_model=schemas.NodesResponse)
+def get_nodes():
+    score_nodes = [
+        schemas.NodeMeta(
+            name=cls.name, label=cls.label,
+            default_params=cls.default_params, param_schema=cls.param_schema,
+        )
+        for cls in NODE_REGISTRY.values()
+    ]
+    gate_nodes = [
+        schemas.NodeMeta(
+            name=cls.name, label=cls.label,
+            default_params=cls.default_params, param_schema=cls.param_schema,
+        )
+        for cls in GATE_REGISTRY.values()
+    ]
+    return schemas.NodesResponse(score_nodes=score_nodes, gate_nodes=gate_nodes)
+
+
+# ---------- /settings ----------
+
+@router.get("/settings", response_model=schemas.SettingsResponse)
+def get_settings():
+    with _conn() as c:
+        row = c.execute(
+            "SELECT weights_json, node_params_json, gate_params_json, "
+            "top_n, rr_ratio, atr_window, atr_stop_mult, updated_at "
+            "FROM screener_settings WHERE id=1"
+        ).fetchone()
+    if row is None:
+        raise HTTPException(503, "settings not initialized")
+    return schemas.SettingsResponse(
+        weights=json.loads(row[0]),
+        node_params=json.loads(row[1]),
+        gate_params=json.loads(row[2]),
+        top_n=row[3], rr_ratio=row[4], atr_window=row[5], atr_stop_mult=row[6],
+        updated_at=row[7],
+    )
+
+
+@router.put("/settings", response_model=schemas.SettingsResponse)
+def put_settings(body: schemas.SettingsBody):
+    now = dt.datetime.utcnow().isoformat()
+    with _conn() as c:
+        c.execute(
+            """UPDATE screener_settings SET
+               weights_json=?, node_params_json=?, gate_params_json=?,
+               top_n=?, rr_ratio=?, atr_window=?, atr_stop_mult=?, updated_at=?
+               WHERE id=1""",
+            (
+                json.dumps(body.weights), json.dumps(body.node_params),
+                json.dumps(body.gate_params),
+                body.top_n, body.rr_ratio, body.atr_window, body.atr_stop_mult, now,
+            ),
+        )
+        c.commit()
+    return schemas.SettingsResponse(**body.model_dump(), updated_at=now)

stock-lab/app/test_screener_router.py

@@ -0,0 +1,64 @@
+import os
+import sqlite3
+import pytest
+from fastapi.testclient import TestClient
+
+from app.screener.schema import ensure_screener_schema
+
+
+@pytest.fixture(autouse=True)
+def isolated_db(tmp_path, monkeypatch):
+    db_path = tmp_path / "screener_router.db"
+    c = sqlite3.connect(db_path)
+    ensure_screener_schema(c)
+    c.close()
+    monkeypatch.setenv("STOCK_DB_PATH", str(db_path))
+
+
+@pytest.fixture
+def client():
+    from app.main import app
+    return TestClient(app)
+
+
+def test_get_nodes_lists_7_score_and_1_gate(client):
+    r = client.get("/api/stock/screener/nodes")
+    assert r.status_code == 200
+    body = r.json()
+    assert len(body["score_nodes"]) == 7
+    assert len(body["gate_nodes"]) == 1
+    assert {n["name"] for n in body["score_nodes"]} == {
+        "foreign_buy", "volume_surge", "momentum",
+        "high52w", "rs_rating", "ma_alignment", "vcp_lite",
+    }
+
+
+def test_settings_get_returns_defaults(client):
+    r = client.get("/api/stock/screener/settings")
+    assert r.status_code == 200
+    body = r.json()
+    assert body["weights"]["foreign_buy"] == 1.0
+    assert body["top_n"] == 20
+
+
+def test_settings_put_then_get_round_trip(client):
+    new_settings = {
+        "weights": {"foreign_buy": 2.5, "momentum": 1.0, "volume_surge": 1.0,
+                    "high52w": 1.2, "rs_rating": 1.2, "ma_alignment": 1.0, "vcp_lite": 0.8},
+        "node_params": {"foreign_buy": {"window_days": 7}},
+        "gate_params": {"min_market_cap_won": 100_000_000_000,
+                        "min_avg_value_won": 500_000_000,
+                        "min_listed_days": 60,
+                        "skip_managed": True, "skip_preferred": True, "skip_spac": True,
+                        "skip_halted_days": 3},
+        "top_n": 30,
+        "rr_ratio": 2.5,
+        "atr_window": 14,
+        "atr_stop_mult": 2.0,
+    }
+    r = client.put("/api/stock/screener/settings", json=new_settings)
+    assert r.status_code == 200
+    r2 = client.get("/api/stock/screener/settings")
+    body = r2.json()
+    assert body["weights"]["foreign_buy"] == 2.5
+    assert body["top_n"] == 30