feat(06-01): extend blogSchema with draft/wordCount/minutes fields

- Add draft: z.boolean().optional().default(false) to allow .where('draft','=',false)
- Add wordCount + minutes as optional (injected by Nitro hook at parse time)
- Collections blog_fr/blog_en unchanged (schema is referenced by variable)

content.config.ts

@@ -6,6 +6,9 @@ const blogSchema = z.object({
   date: z.string(),
   tags: z.array(z.string()).optional(),
   image: z.string().optional(),
+  draft: z.boolean().optional().default(false),
+  wordCount: z.number().optional(),
+  minutes: z.number().optional(),
 })
 
 export default defineContentConfig({