feat: Add review events persistence, version display, and auto-versioning system

backend/app/models/review_event.py

@@ -0,0 +1,27 @@
+"""Review Event model - хранение событий процесса review"""
+
+from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, JSON
+from sqlalchemy.orm import relationship
+from datetime import datetime
+
+from app.database import Base
+
+
+class ReviewEvent(Base):
+    """Событие процесса review"""
+    __tablename__ = "review_events"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    review_id = Column(Integer, ForeignKey("reviews.id", ondelete="CASCADE"), nullable=False, index=True)
+    event_type = Column(String(50), nullable=False)  # agent_step, llm_message, review_started, etc.
+    step = Column(String(100), nullable=True)  # fetch_pr_info, analyze_files, etc.
+    message = Column(Text, nullable=True)
+    data = Column(JSON, nullable=True)  # Дополнительные данные события
+    created_at = Column(DateTime, default=datetime.utcnow, nullable=False, index=True)
+    
+    # Relationships
+    review = relationship("Review", back_populates="events")
+    
+    def __repr__(self):
+        return f"<ReviewEvent(id={self.id}, review_id={self.review_id}, type={self.event_type})>"
+