Update PatchMon version to 1.2.7

- Updated agent script version to 1.2.7
- Updated all package.json files to version 1.2.7
- Updated backend version references
- Updated setup script version references
- Fixed agent file path issues in API endpoints
- Fixed linting issues (Node.js imports, unused variables, accessibility)
- Created comprehensive version update guide in patchmon-admin/READMEs/

frontend/package.json

@@ -1,7 +1,7 @@
 {
 	"name": "patchmon-frontend",
 	"private": true,
-	"version": "1.2.6",
+	"version": "1.2.7",
 	"license": "AGPL-3.0",
 	"type": "module",
 	"scripts": {