[improvement] Remove legacy publisher setup script and references

Delete packages/plugin-dkg-publisher/setup.js and remove setup entrypoints from plugin package scripts.

Keep Agent-owned setup/management as the only supported flow and update legacy bootstrap wording.

Author: Jurij Skornik

packages/plugin-dkg-publisher/README.md

@@ -40,9 +40,6 @@ cd apps/agent
 npm run script:publisher
 ```
 
-`npm run setup` in this package is legacy compatibility for older workflows that
-still rely on `.env.publisher`.
-
 ### 2. Start the Application
 
 The plugin runs automatically when you start your DKG Agent:

packages/plugin-dkg-publisher/package-addition.json

@@ -1,6 +1,5 @@
 {
   "scripts": {
-    "km:setup": "node setup.js",
     "km:migrate": "npm run db:migrate",
     "km:worker": "npm run worker",
     "km:dashboard": "npm run dashboard",

packages/plugin-dkg-publisher/package.json

@@ -28,7 +28,6 @@
     "check-types": "tsc --noEmit",
     "lint": "eslint . --max-warnings 0",
     "test": "mocha --loader ../../node_modules/tsx/dist/loader.mjs 'tests/**/*.spec.ts'",
-    "setup": "node setup.js",
     "db:generate": "drizzle-kit generate:mysql",
     "db:migrate": "node migrate.js",
     "db:push": "drizzle-kit push:mysql",