feat(mcp): подготовить сервер и доступ к приёмке

backend/scripts/writer-profile/application-writer-profile-canonical.ts

@@ -0,0 +1,9 @@
+import {createHash} from 'node:crypto'
+
+/** Exact writer-profile v1 canonical bytes. Pure value codec; no trust/authority. */
+export function canonical(value:unknown):string {
+ return JSON.stringify(value,(_key,item:unknown)=>item&&typeof item==='object'&&!Array.isArray(item)
+  ?Object.fromEntries(Object.entries(item).sort(([a],[b])=>a<b?-1:a>b?1:0)):item)
+}
+export const sha=(value:Uint8Array|string)=>createHash('sha256').update(value).digest('hex')
+export const bytes=(value:unknown)=>Buffer.from(canonical(value)+'\n','utf8')