first commit

backend/app/core/config.py

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+from pathlib import Path
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(
+        env_file=".env",
+        env_file_encoding="utf-8",
+        extra="ignore",
+    )
+
+    DATABASE_URL: str = "postgresql+asyncpg://fundtracer:fundtracer_dev@localhost:5432/fundtracer"
+    DATABASE_URL_SYNC: str = "postgresql://fundtracer:fundtracer_dev@localhost:5432/fundtracer"
+    REDIS_URL: str = "redis://localhost:6379/0"
+
+    UPLOAD_DIR: str = "./uploads"
+
+    OCR_API_KEY: str = ""
+    OCR_API_URL: str = ""
+    LLM_API_KEY: str = ""
+    LLM_API_URL: str = ""
+    LLM_MODEL: str = ""
+
+    SECRET_KEY: str = "change-me-in-production"
+    DEBUG: bool = True
+
+    @property
+    def upload_path(self) -> Path:
+        p = Path(self.UPLOAD_DIR)
+        p.mkdir(parents=True, exist_ok=True)
+        return p
+
+
+settings = Settings()

backend/app/core/database.py

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+from collections.abc import AsyncGenerator
+
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+from sqlalchemy.orm import DeclarativeBase
+
+from app.core.config import settings
+
+engine = create_async_engine(settings.DATABASE_URL, echo=settings.DEBUG, future=True)
+async_session_factory = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+async def get_db() -> AsyncGenerator[AsyncSession, None]:
+    async with async_session_factory() as session:
+        try:
+            yield session
+            await session.commit()
+        except Exception:
+            await session.rollback()
+            raise

backend/app/core/security.py

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+"""Placeholder for authentication & authorization.
+
+In the competition demo we skip real auth. This module reserves the
+extension point so RBAC / JWT can be plugged in later.
+"""
+
+
+async def get_current_user() -> str:
+    return "demo_user"