feat: implement researcher and publication management with sync functionality

backend/app/main.py

@@ -1,9 +1,32 @@
 from fastapi import FastAPI
-from app.services.orcid_client import ORCIDClient
+from app.api.researchers import router as researchers_router
+from app.db.session import Base, engine
 
-app = FastAPI()
 
-@app.get("/orcid/{orcid_id}/works")
-def test_works(orcid_id: str):
-    client = ORCIDClient()
-    return client.fetch_works(orcid_id)
+app = FastAPI(
+    title="ORCID SWORD Backend",
+    description="Backend para sincronización ORCID y exportación SWORD",
+    version="1.0.0"
+)
+
+
+# ---------------------------------------------------------
+# Crear tablas al iniciar la aplicación
+# ---------------------------------------------------------
+@app.on_event("startup")
+def startup_event():
+    Base.metadata.create_all(bind=engine)
+
+
+# ---------------------------------------------------------
+# Healthcheck
+# ---------------------------------------------------------
+@app.get("/health")
+def health():
+    return {"status": "ok"}
+
+
+# ---------------------------------------------------------
+# Registrar routers
+# ---------------------------------------------------------
+app.include_router(researchers_router)