se agregaron nuevas caracteristicas

backend/app/models/models.py

@@ -27,6 +27,7 @@ class Client(Base):
     id = Column(Integer, primary_key=True, index=True)
     client_code = Column(String(50), unique=True, index=True, nullable=False)  # e.g., CLIENT-0001
     name = Column(String(255), nullable=False)
+    alias = Column(String(255), nullable=True)
     hostname = Column(String(255), nullable=True)
     os_info = Column(String(255), nullable=True)
     ip_address = Column(String(100), nullable=True)
@@ -65,6 +66,7 @@ class RegistrationCode(Base):
     code = Column(String(50), unique=True, index=True, nullable=False)  # e.g., OED-A1B2-C3D4
     is_used = Column(Boolean, default=False, nullable=False)
     client_name_hint = Column(String(255), nullable=True)
+    client_id = Column(Integer, ForeignKey("clients.id"), nullable=True)
     expires_at = Column(DateTime(timezone=True), nullable=False)
     created_at = Column(DateTime(timezone=True), default=utc_now, nullable=False)
 
@@ -172,3 +174,9 @@ class EventLog(Base):
     ip_address = Column(String(100), nullable=True)
     message = Column(Text, nullable=False)
     details_json = Column(Text, nullable=True)
+
+class SystemSetting(Base):
+    __tablename__ = "system_settings"
+
+    key = Column(String(100), primary_key=True, index=True)
+    value = Column(String(1024), nullable=False)