schema: make Organization node resolvable on Article/TechArticle pages (#20524)

BlogPosting, FAQPage, and TechArticle nodes emit publisher (and related
fields) as a bare {"@id": "https://www.pulumi.com/#organization"}
reference. That @id only resolves to concrete data (name, logo) when the
same page's JSON-LD @graph also defines the Organization node — but only
the homepage does. Structured-data parsers evaluate each URL's JSON-LD
independently and do not dereference @id links across pages, so
publisher.name (required by schema.org/Article) and publisher.logo
(recommended for rich results) have been undefined on every blog post and
docs page.

This adds a minimal, resolvable Organization node (name, url, logo) to
the @graph on every non-home page, with values copied verbatim from the
homepage's node so the entity stays consistent site-wide. The homepage
keeps its existing full corporate entity (founders, address, sameAs,
etc.) unchanged and does not get a duplicate node.

Verified via local Hugo build: publisher @id now resolves to a concrete
Organization node with name + logo on both a blog post
(/blog/infrastructure-as-code-tools/) and a docs page
(/docs/iac/concepts/), while the homepage still emits exactly one
Organization node.

Co-authored-by: workprentice <257153108+workprentice@users.noreply.github.com>

Author: workprentice[bot]

layouts/partials/schema/graph-builder.html

@@ -241,6 +241,34 @@
     "keywords" "infrastructure as code, IaC, cloud, DevOps, automation, platform engineering"
   }}
   {{ $graph = $graph | append $software }}
+{{ else }}
+  {{/* Add a minimal, resolvable Organization node on every non-home page.
+       article-entity.html (and other collectors) emit publisher/author/citation
+       fields as a bare {"@id": "https://www.pulumi.com/#organization"} reference,
+       which only resolves to concrete data (name, logo) if the *same page's*
+       @graph also defines that @id. Google's structured-data parsers evaluate
+       each URL's JSON-LD independently and do not dereference @id links across
+       pages, so without this, publisher.name (required by schema.org/Article)
+       and publisher.logo (recommended for rich results) are undefined on every
+       blog post and docs page. Kept intentionally minimal (name/url/logo only,
+       vs. the full corporate entity above) to avoid duplicating detailed
+       metadata like founders/address/sameAs across thousands of pages; values
+       are copied verbatim from the homepage's Organization node above so the
+       entity stays consistent site-wide. */}}
+  {{ $orgMinimal := dict
+    "@type" (slice "Organization" "Corporation")
+    "@id" "https://www.pulumi.com/#organization"
+    "name" "Pulumi Corporation"
+    "alternateName" "Pulumi"
+    "url" "https://www.pulumi.com"
+    "logo" (dict
+      "@type" "ImageObject"
+      "url" "https://www.pulumi.com/logos/brand/logo.png"
+      "width" 600
+      "height" 60
+    )
+  }}
+  {{ $graph = $graph | append $orgMinimal }}
 {{ end }}
 
 {{/* Add comparison table to graph (collected earlier to wire hasPart into WebPage) */}}