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

backend/app/main.py

@@ -118,6 +118,20 @@ async def health_check():
     return {"status": "healthy"}
 
 
+@app.get("/version")
+async def get_version():
+    """Get backend version"""
+    try:
+        version_file = Path(__file__).parent.parent / "VERSION"
+        if version_file.exists():
+            version = version_file.read_text().strip()
+        else:
+            version = "unknown"
+        return {"version": version}
+    except Exception:
+        return {"version": "unknown"}
+
+
 @app.websocket("/ws/reviews")
 async def websocket_endpoint(websocket: WebSocket):
     """WebSocket endpoint for real-time review updates"""