Create experiment_repo.py

backend/app/repositories/experiment_repo.py

@@ -0,0 +1,16 @@
+from sqlalchemy import Column, Integer, String, Text
+from backend.app.db import Base
+
+
+class Experiment(Base):
+    __tablename__ = "experiments"
+
+    id = Column(String, primary_key=True, index=True)
+    dataset_id = Column(String, nullable=False, index=True)
+    algorithm = Column(String, nullable=False)
+    status = Column(String, nullable=False)
+    config_json = Column(Text, nullable=True)
+    metrics_json = Column(Text, nullable=True)
+    summary_json = Column(Text, nullable=True)
+    runtime_ms = Column(Integer, nullable=True)
+    error_message = Column(Text, nullable=True)