fix(signal_v2-phase3a): V1 KIS env pattern + test isolation fix

config.py: kis_env_type (virtual/real) + KIS_REAL_*/KIS_VIRTUAL_* env
variables (V1 호환). kis_app_key/kis_app_secret/kis_account properties
auto-select based on env type.

main.py: KIS not-configured warning uses descriptive message including
env type + expected var name.

test_main.py: monkeypatch load_dotenv to no-op + setenv empty string
(instead of delenv) — defeats .env re-read on importlib.reload.
Pre-existing test_startup_warns_if_webai_api_key_missing also fixed.

33/33 tests pass (was 31/33).

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

signal_v2/config.py

@@ -20,13 +20,14 @@ class Settings:
     db_path: Path = field(
         default_factory=lambda: Path(__file__).parent / "data" / "signal_v2.db"
     )
-    # Phase 3a additions
+    # KIS — V1 호환 패턴 (KIS_ENV_TYPE virtual/real)
-    kis_app_key: str = field(default_factory=lambda: os.getenv("KIS_APP_KEY", "").strip())
+    kis_env_type: str = field(default_factory=lambda: os.getenv("KIS_ENV_TYPE", "virtual").lower())
-    kis_app_secret: str = field(default_factory=lambda: os.getenv("KIS_APP_SECRET", "").strip())
+    kis_real_app_key: str = field(default_factory=lambda: os.getenv("KIS_REAL_APP_KEY", "").strip())
-    kis_account: str = field(default_factory=lambda: os.getenv("KIS_ACCOUNT", "").strip())
+    kis_real_app_secret: str = field(default_factory=lambda: os.getenv("KIS_REAL_APP_SECRET", "").strip())
-    kis_is_virtual: bool = field(
+    kis_real_account: str = field(default_factory=lambda: os.getenv("KIS_REAL_ACCOUNT", "").strip())
-        default_factory=lambda: os.getenv("KIS_IS_VIRTUAL", "true").lower() == "true"
+    kis_virtual_app_key: str = field(default_factory=lambda: os.getenv("KIS_VIRTUAL_APP_KEY", "").strip())
-    )
+    kis_virtual_app_secret: str = field(default_factory=lambda: os.getenv("KIS_VIRTUAL_APP_SECRET", "").strip())
+    kis_virtual_account: str = field(default_factory=lambda: os.getenv("KIS_VIRTUAL_ACCOUNT", "").strip())
     v1_token_path: Path = field(
         default_factory=lambda: Path(
             os.getenv("V1_TOKEN_PATH",
@@ -34,6 +35,22 @@ class Settings:
         )
     )
 
+    @property
+    def kis_is_virtual(self) -> bool:
+        return self.kis_env_type != "real"
+
+    @property
+    def kis_app_key(self) -> str:
+        return self.kis_real_app_key if self.kis_env_type == "real" else self.kis_virtual_app_key
+
+    @property
+    def kis_app_secret(self) -> str:
+        return self.kis_real_app_secret if self.kis_env_type == "real" else self.kis_virtual_app_secret
+
+    @property
+    def kis_account(self) -> str:
+        return self.kis_real_account if self.kis_env_type == "real" else self.kis_virtual_account
+
 
 def get_settings() -> Settings:
     return Settings()

signal_v2/main.py

@@ -38,7 +38,8 @@ async def lifespan(app: FastAPI):
         )
     if not settings.kis_app_key:
         logger.warning(
-            "KIS_APP_KEY not configured — KIS REST/WebSocket disabled"
+            "KIS app_key not configured (KIS_ENV_TYPE=%s, KIS_%s_APP_KEY missing) — KIS REST/WebSocket disabled",
+            settings.kis_env_type, settings.kis_env_type.upper()
         )
 
     _ctx.client = StockClient(settings.stock_api_url, settings.webai_api_key)

signal_v2/tests/test_main.py

@@ -23,11 +23,15 @@ def test_health_endpoint_returns_status_online(monkeypatch):
 
 
 def test_startup_warns_if_webai_api_key_missing(monkeypatch, caplog):
-    monkeypatch.delenv("WEBAI_API_KEY", raising=False)
+    # Use setenv with empty string + no-op load_dotenv to defeat .env re-read on reload
+    monkeypatch.setattr("signal_v2.config.load_dotenv", lambda *a, **k: None)
+    monkeypatch.setenv("WEBAI_API_KEY", "")
     monkeypatch.setenv("STOCK_API_URL", "https://test.stock.local")
     import importlib
     from signal_v2 import config as cfg
     importlib.reload(cfg)
+    # After reload, load_dotenv reference is fresh — re-patch
+    monkeypatch.setattr("signal_v2.config.load_dotenv", lambda *a, **k: None)
     from signal_v2 import main as main_mod
     importlib.reload(main_mod)
     with caplog.at_level(logging.WARNING, logger="signal_v2.main"):
@@ -37,17 +41,22 @@ def test_startup_warns_if_webai_api_key_missing(monkeypatch, caplog):
 
 
 def test_startup_warns_if_kis_app_key_missing(monkeypatch, caplog):
-    """KIS_APP_KEY 미설정 시 startup WARNING (KIS 호출 disabled)."""
+    """KIS app_key 미설정 시 startup WARNING (KIS 호출 disabled) — V1 패턴."""
+    monkeypatch.setattr("signal_v2.config.load_dotenv", lambda *a, **k: None)
     monkeypatch.setenv("STOCK_API_URL", "https://test.stock.local")
     monkeypatch.setenv("WEBAI_API_KEY", "test-secret")
-    monkeypatch.delenv("KIS_APP_KEY", raising=False)
+    # V1 pattern: kis_env_type=virtual, both virtual keys empty
+    monkeypatch.setenv("KIS_ENV_TYPE", "virtual")
+    monkeypatch.setenv("KIS_VIRTUAL_APP_KEY", "")
+    monkeypatch.setenv("KIS_REAL_APP_KEY", "")
 
     import importlib
     from signal_v2 import config as cfg
     importlib.reload(cfg)
+    monkeypatch.setattr("signal_v2.config.load_dotenv", lambda *a, **k: None)
     from signal_v2 import main as main_mod
     importlib.reload(main_mod)
     with caplog.at_level(logging.WARNING, logger="signal_v2.main"):
         with TestClient(main_mod.app) as client:
             client.get("/health")
-        assert any("KIS_APP_KEY" in rec.message for rec in caplog.records)
+        assert any("KIS" in rec.message and "app_key" in rec.message.lower() for rec in caplog.records)