Complete backend infrastructure and authentication system

Co-authored-by: mblanke <9078342+mblanke@users.noreply.github.com>

backend/app/models/artifact.py

@@ -0,0 +1,20 @@
+from sqlalchemy import Column, Integer, String, DateTime, ForeignKey, Text, JSON
+from sqlalchemy.orm import relationship
+from datetime import datetime
+
+from app.core.database import Base
+
+
+class Artifact(Base):
+    __tablename__ = "artifacts"
+
+    id = Column(Integer, primary_key=True, index=True)
+    artifact_type = Column(String, nullable=False)  # hash, ip, domain, email, etc.
+    value = Column(String, nullable=False)
+    description = Column(Text, nullable=True)
+    case_id = Column(Integer, ForeignKey("cases.id"), nullable=True)
+    artifact_metadata = Column(JSON, nullable=True)
+    created_at = Column(DateTime, default=datetime.utcnow)
+
+    # Relationships
+    case = relationship("Case", back_populates="artifacts")