fix: Prevent blocking healthcheck during Inference (#837)

**Reason for Change**:
Minimal changes required for ensuring rag engine image doesn't fail

Signed-off-by: Ishaan Sehgal <ishaanforthewin@gmail.com>

presets/ragengine/main.py

@@ -31,9 +31,8 @@
 rag_ops = VectorStoreManager(vector_store_handler)
 
 @app.get("/health", response_model=HealthStatus)
-async def health_check():
+def health_check():
     try:
-
         if embedding_manager is None:
             raise HTTPException(status_code=500, detail="Embedding manager not initialized")