Global refactoring of the project to use poetry and implement tests,

fixing bugs, changing the handling of dto and db models, preparing to
add new functionality

library_service/main.py

@@ -0,0 +1,28 @@
+from alembic import command
+from alembic.config import Config
+from contextlib import asynccontextmanager
+from fastapi import FastAPI
+from toml import load
+
+from .settings import engine, get_app
+from .routers import api_router
+from .routers.misc import get_info
+
+app = get_app()
+alembic_cfg = Config("alembic.ini")
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    print("[+] Initializing...")
+
+    # Initialize the database
+    with engine.begin() as connection:
+        alembic_cfg.attributes['connection'] = connection
+        command.upgrade(alembic_cfg, "head")
+
+    print("[+] Starting...")
+    yield  # Here FastAPI will start handling requests;
+    print("[+] Application shutdown")
+
+# Include routers
+app.include_router(api_router)