feat(states): add initial seed data and update State model with foreign key

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

@@ -1,7 +1,7 @@
 from typing import Optional
 
 from core.database import Base
-from sqlalchemy import PrimaryKeyConstraint, String
+from sqlalchemy import ForeignKey, PrimaryKeyConstraint, String
 from sqlalchemy.orm import Mapped, mapped_column
 
 
@@ -12,12 +12,11 @@ class State(Base):
         {"schema": "public", "extend_existing": True},
     )
 
-    m3_key: Mapped[str] = mapped_column(String(3), nullable=False)
+    m3_key: Mapped[str] = mapped_column(ForeignKey("public.countries.m3_key"), nullable=False)
     description: Mapped[str] = mapped_column(
         String(50), nullable=False
     )  # valor legal en español
-    mex_key: Mapped[Optional[str]] = mapped_column(String(3))
-    ame_key: Mapped[Optional[str]] = mapped_column(String(2))
+    mex_key: Mapped[Optional[str]] = mapped_column(String(3))    
 
     def __repr__(self):
         return f"<State(m3_key={self.m3_key}, description={self.description}, mex_key={self.mex_key}, ame_key={self.ame_key})>"