Remove root GET endpoint

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

main.py

@@ -2,11 +2,6 @@ from fastapi import FastAPI
 
 app = FastAPI(title="ZHSAPI")
 
-@app.get("/")
-def root():
-    from fastapi.responses import RedirectResponse
-    return RedirectResponse(url="/docs")
-
 @app.get("/health")
 def health():
     return {"status": "ok"}