Align storefront content URLs with live slug-based routes.

Use /blog/{slug}, /portfolio/{slug}, and /instruction/{slug} in sitemap defaults and emit CMS slugs for blogs/portfolios instead of title-derived paths.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/website-api/openapi.json

@@ -1606,7 +1606,7 @@
         "tags": [
           "Blogs"
         ],
-        "summary": "Blog by id (preferred for /blog/{id}/{titleSlug} pages)",
+        "summary": "Blog by id (legacy; prefer slug routes `/blog/{slug}`)",
         "parameters": [
           {
             "$ref": "#/components/parameters/domain"
@@ -1959,7 +1959,7 @@
         "tags": [
           "Portfolios"
         ],
-        "summary": "Portfolio by id (preferred for /portfolios/{id}/{titleFaSlug} pages)",
+        "summary": "Portfolio by id (legacy; prefer slug routes `/portfolio/{slug}`)",
         "parameters": [
           {
             "$ref": "#/components/parameters/domain"