feat: add project config and database connection

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,8 @@
+.venv/
+__pycache__/
+*.pyc
+.env
+*.egg-info/
+dist/
+build/
+.pytest_cache/

app/core/config.py

@@ -0,0 +1,32 @@
+from sqlalchemy.engine import URL
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    SQL_SERVER_HOST: str
+    SQL_SERVER_PORT: int = 1433
+    SQL_SERVER_DATABASE: str
+    SQL_SERVER_USERNAME: str
+    SQL_SERVER_PASSWORD: str
+    SQL_SERVER_DRIVER: str = "{ODBC Driver 18 for SQL Server}"
+    SQL_SERVER_TRUST_SERVER_CERTIFICATE: str = "yes"
+
+    @property
+    def database_url(self) -> URL:
+        return URL.create(
+            "mssql+pyodbc",
+            username=self.SQL_SERVER_USERNAME,
+            password=self.SQL_SERVER_PASSWORD,
+            host=self.SQL_SERVER_HOST,
+            port=self.SQL_SERVER_PORT,
+            database=self.SQL_SERVER_DATABASE,
+            query={
+                "driver": self.SQL_SERVER_DRIVER.strip("{}"),
+                "TrustServerCertificate": self.SQL_SERVER_TRUST_SERVER_CERTIFICATE,
+            },
+        )
+
+    model_config = SettingsConfigDict(env_file=".env", extra="ignore")
+
+
+settings = Settings()

app/core/database.py

@@ -0,0 +1,25 @@
+from typing import Generator
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker
+
+from app.core.config import settings
+
+engine = create_engine(
+    settings.database_url,
+    pool_pre_ping=True,
+    pool_recycle=1800,
+)
+SessionLocal = sessionmaker(bind=engine)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+def get_db() -> Generator[Session, None, None]:
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()

requirements.txt

@@ -1,2 +1,8 @@
 fastapi>=0.115.0
 uvicorn[standard]>=0.34.0
+sqlalchemy>=2.0.0
+pyodbc>=5.2.0
+pydantic-settings>=2.0.0
+python-dotenv>=1.0.0
+pytest>=8.0.0
+httpx>=0.28.0