Bump backend and frontend to 0.1.1 for the cosign-signed build

Both packages were last published at 0.1.0 unsigned. The next push
attaches a cosign signature, which is a property of the published
artifact, so the version tag has to move forward — and the workflow's
own pre-push existence check would otherwise refuse to overwrite the
existing 0.1.0 digests in Harbor.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tehriehlbudget-backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "tehriehlbudget-backend",
-  "version": "0.1.0",
+  "version": "0.1.1",
   "description": "",
   "author": "",
   "private": true,

tehriehlbudget-frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "tehriehlbudget-frontend",
   "private": true,
-  "version": "0.1.0",
+  "version": "0.1.1",
   "type": "module",
   "scripts": {
     "dev": "vite",