fix(integrations): resolve docsLink once when checking the vendor allowlist

The stale-allowlist predicate read block.docsLink directly while the main
loop read the resolved link, so an allowlisted block that dropped its
explicit docsLink produced undefined from the optional chain, negated to
true, and was treated as still vendor-linked — the stale entry went
undetected.

Record vendor-linked types during the single pass that already resolves
each link, so both checks agree by construction.

Author: waleedlatif1

scripts/check-integration-catalog.ts

@@ -104,9 +104,11 @@ const VENDOR_DOCS_INTEGRATIONS: ReadonlySet<string> = new Set([
  */
 function verifyDocsLinks(blocks: readonly BlockConfig[]): void {
   const issues: string[] = []
+  const vendorLinked = new Set<string>()
   for (const block of blocks) {
     const docsLink = block.docsLink ?? defaultIntegrationDocsUrl(block.type)
     if (!docsLink.startsWith(DOCS_ORIGIN)) {
+      vendorLinked.add(block.type)
       if (!VENDOR_DOCS_INTEGRATIONS.has(block.type)) {
         issues.push(
           `"${block.type}" docsLink points outside ${DOCS_ORIGIN} (${docsLink}) — add it to VENDOR_DOCS_INTEGRATIONS if that is intentional`
@@ -119,12 +121,10 @@ function verifyDocsLinks(blocks: readonly BlockConfig[]): void {
       issues.push(`"${block.type}" docsLink 404s — no docs page at en/${page}.mdx (${docsLink})`)
     }
   }
-  const staleAllowlist = [...VENDOR_DOCS_INTEGRATIONS].filter(
-    (type) =>
-      !blocks.some((block) => block.type === type && !block.docsLink?.startsWith(DOCS_ORIGIN))
-  )
-  for (const type of staleAllowlist) {
-    issues.push(`"${type}" is in VENDOR_DOCS_INTEGRATIONS but no longer links to vendor docs`)
+  for (const type of VENDOR_DOCS_INTEGRATIONS) {
+    if (!vendorLinked.has(type)) {
+      issues.push(`"${type}" is in VENDOR_DOCS_INTEGRATIONS but no longer links to vendor docs`)
+    }
   }
   if (issues.length > 0) {
     throw new Error(