Add reference data models and seed data for incoterms, invoice types, material types, payment methods, pedimento codes, pedimento regimens, sectors, states, transport modes, transport types, and valuation methods

- Implemented SQLAlchemy models for incoterms, invoice types, material types, payment methods, pedimento codes, pedimento regimens, sectors, states, transport modes, transport types, and valuation methods.
- Added seed data for each reference data model to populate the database with initial values.
- Ensured primary key constraints and appropriate data types for each model.
- Established relationships where necessary, particularly in pedimento codes and regimens.

backend/api/v1/modules/public/reference_data/payment_methods/models.py

@@ -0,0 +1,16 @@
+from sqlalchemy import String, PrimaryKeyConstraint
+from sqlalchemy.orm import mapped_column, Mapped
+from core.database import Base
+
+class PaymentMethod(Base):
+    __tablename__ = "payment_methods" #GFormaPago
+    __table_args__ = (
+        PrimaryKeyConstraint("key", name="payment_methods_pkey"),
+        {"schema": "public"}  # opcional
+    )
+
+    key: Mapped[str] = mapped_column(String(2), nullable=False)
+    description: Mapped[str] = mapped_column(String(100), nullable=False)
+
+    def __repr__(self):
+        return f"<PaymentMethod(key={self.key}, description={self.description})>"

backend/api/v1/modules/public/reference_data/payment_methods/seed.py

@@ -0,0 +1,22 @@
+seed = [
+    ("0", "EFECTIVO."),
+    ("10", "DEROGADA.   --- (CERTIFICADOS ESPECIALES DE TESORERIA PUBLICO)"),
+    ("11", "DEROGADA.   --- (CERTIFICADOS ESPECIALES DE TESORERIA PRIVADO)"),
+    ("12", "COMPENSACION."),
+    ("13", "PAGO YA EFECTUADO."),
+    ("14", "CONDONACIONES."),
+    ("15", "CUENTAS ADUANERAS DE GARANTIA POR PRECIOS ESTIMADOS"),
+    ("16", "ACREDITAMIENTO."),
+    ("18", "ESTIMULO FISCAL."),
+    ("19", "OTROS MEDIOS DE GARANTIA."),
+    ("2", "FIANZA."),
+    ("20", "DEROGADA.   --- (PAGO CONFORME AL ARTICULO 7 DE LA LEY DE INGRESOS DE LA FEDERACION, VIGENTE)"),
+    ("21", "CRÉDITO EN IVA E IEPS."),
+    ("22", "GARANTÍA EN IVA E IEPS."),
+    ("4", "DEPOSITO EN CUENTA ADUANERA."),
+    ("5", "TEMPORAL NO SUJETA A IMPUESTOS."),
+    ("6", "PENDIENTE DE PAGO."),
+    ("7", "CARGO A PARTIDA PRESUPUESTAL GOBIERNO FEDERAL."),
+    ("8", "FRANQUICIA."),
+    ("9", "EXENTO DE PAGO."),
+]