fix: normalize glob paths with split(sep).join('/') on Windows

glob/globSync returns host-separator paths on Windows. Nine scripts that consume these paths for split('/'), manifest-key comparison, startsWith/includes exclusion checks, or committed-output rendering now normalize with .map(s => s.split(sep).join('/')) at ingestion. This replaces the previous replaceAll('\\\\', '/') with an explicit, self-documenting OS-separator-to-POSIX conversion.

scripts/verify-package-readme-model-experience.ts

@@ -6,7 +6,7 @@
  */
 
 import { existsSync, globSync, readFileSync } from 'node:fs'
-import { relative, resolve } from 'node:path'
+import { relative, resolve, sep } from 'node:path'
 import { markdownHeadingLines, markdownProseLines, type MarkdownProseLine } from './markdown.ts'
 
 const root = resolve(import.meta.dirname, '..')
@@ -145,7 +145,7 @@ for (const line of readFileSync(resolve(root, 'docs/tool-catalog.md'), 'utf8').s
 }
 
 const failures: Failure[] = []
-const packageJsons = globSync('packages/*/*/package.json', { cwd: root }).sort()
+const packageJsons = globSync('packages/*/*/package.json', { cwd: root }).map(path => path.split(sep).join('/')).sort()
 const scannedPackages = new Set(packageJsons.map(path => path.slice(0, -'/package.json'.length)))
 let structuredCount = 0
 let contextSurfaceCount = 0