sitemap 동적 생성 및 색인 제어 추가

- SitemapController: /sitemap.xml 을 Request.Categories/Brand enum 에서 생성.
  기존 정적 파일은 lastmod 가 2025-08-10 에 고정된 외부 생성기 덤프였고,
  UseStaticFiles 가 라우팅보다 먼저 실행되어 컨트롤러에 도달하지 못하므로 제거.
  URL 집합은 기존 31개와 완전히 동일함을 확인.
- _Layout: canonical 링크 추가. 쿼리스트링이 붙은 주소의 중복 색인을 막는다.
  ViewData["NoIndex"] 인 페이지는 canonical 대신 noindex 를 내보낸다.
- Search/Error 뷰: NoIndex 표시 (검색은 키워드마다 주소가 달라지고 keyword 없이는 400)
- robots.txt: Disallow: /search 추가

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

wwwroot/sitemap.xml

@@ -1,167 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<urlset
-      xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
-      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-      xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9
-            http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">
-<!-- created with Free Online Sitemap Generator www.xml-sitemaps.com -->
-
-
-<url>
-  <loc>https://goods.web.or.kr/</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>1.00</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/GoldBox</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/Event</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1001</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1002</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1010</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1011</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1012</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1013</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1014</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1015</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1016</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1017</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1018</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1019</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1020</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1021</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1024</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1025</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1026</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1029</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/category/1030</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/pl/1001</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/pl/1002</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/pl/1003</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/pl/1004</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/pl/1006</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/pl/1007</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/pl/1008</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/pl/1010</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-<url>
-  <loc>https://goods.web.or.kr/pl/1011</loc>
-  <lastmod>2025-08-10T23:50:20+00:00</lastmod>
-  <priority>0.80</priority>
-</url>
-
-
-</urlset>