chore(infra) : remove release artefact pipeline

Keep only Docker-based deployment workflow.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/release-artefact.yml

@@ -1,67 +0,0 @@
-name: Build Release Artefact
-
-on:
-  push:
-    tags:
-      - "v*"
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-          persist-credentials: false
-
-      - name: Setup PHP
-        uses: shivammathur/setup-php@v2
-        with:
-          php-version: "8.4"
-          extensions: mbstring, intl, pdo_pgsql, xml, curl, zip, gd
-
-      - name: Setup Node
-        uses: actions/setup-node@v4
-        with:
-          node-version: "lts/*"
-
-      - name: Install backend deps (prod)
-        env:
-          APP_ENV: prod
-          APP_DEBUG: "0"
-        run: composer install --no-dev --optimize-autoloader --no-interaction --no-scripts
-
-      - name: Build frontend (static)
-        run: |
-          cd frontend
-          npm ci
-          CI=1 NUXT_TELEMETRY_DISABLED=1 NUXT_PUBLIC_API_BASE_URL=/api NUXT_PUBLIC_APP_BASE=/ npm run generate
-          test -f .output/public/index.html
-
-      - name: Build artefact
-        shell: bash
-        run: |
-          set -euo pipefail
-          mkdir -p release
-          tar -czf "release/inventory-${GITHUB_REF_NAME}.tar.gz" \
-            .env \
-            bin \
-            config \
-            migrations \
-            public \
-            src \
-            templates \
-            vendor \
-            composer.json \
-            composer.lock \
-            symfony.lock \
-            VERSION \
-            frontend/.output
-
-      - name: Create Release
-        uses: softprops/action-gh-release@v2
-        with:
-          files: release/inventory-${{ github.ref_name }}.tar.gz
-        env:
-          GITHUB_TOKEN: ${{ secrets.REGISTRY_TOKEN }}