security: Gradio 버전 업그레이드 (4.44.0 -> 5.50.0)

보안 취약점 패치:
- GHSA-576c-3j53-r9jj (SSRF)
- GHSA-prpg-p95c-32fv (Windows path-traversal)
- GHSA-gvv6-33j7-884g (file-upload XSS)
- GHSA-pgfv-gvc5-prfg (audio component path-traversal)
- GHSA-7xmc-vhjp-qv5q (DataFrame zip-bomb DoS)
- CVE-2024-47869 (timing attack)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

README.md

@@ -4,7 +4,7 @@ emoji: "!"
 colorFrom: blue
 colorTo: red
 sdk: gradio
-sdk_version: "4.44.0"
+sdk_version: "5.50.0"
 app_file: app.py
 pinned: false
 license: mit

requirements.txt

@@ -9,7 +9,7 @@ torchvision>=0.15.0
 ultralytics>=8.0.0
 
 # Web UI
-gradio==4.44.0  # HF Spaces sdk_version과 일치
+gradio>=5.50.0  # 보안 취약점 패치 (CVE-2024 SSRF, XSS, path traversal 등)
 plotly>=5.0.0
 
 # Computer Vision