feat(ci): aggiungi varianti -github dei reusable e fix audit Python

- crea gemelli X-github.yml per ogni reusable con action da github.com (fallback mirror gitea.com)
- python-dependency-check/outdated: audit in venv isolata (fix falsi positivi da runner ML)
- python-dependency-check/outdated: deduplica issue (commento invece di nuova issue)
- examples: aggiungi ci-github.yml e release-github.yml in tutte le cartelle

Fixes #3 @3h

examples/documentazione/ci-github.yml

@@ -0,0 +1,26 @@
+# Copia in: .gitea/workflows/ci.yml
+# Usato da: siti documentazione Nuxt 4 con SSR e Docker
+#
+# Prerequisiti:
+#   - package.json con script: lint:check, typecheck, format:check, build, test
+#   - Secrets: NPM_TOKEN (accesso registry @pzeta privato)
+
+name: CI
+
+on:
+  push:
+    branches:
+      - main
+    paths-ignore:
+      - '**.md'
+      - 'content/**'
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  quality-gates:
+    uses: https://gitea.pzetatouch.it/devops/shared-actions/.gitea/workflows/quality-gates-github.yml@v1
+    secrets: inherit
+    with:
+      npm-version: '11'   # lockfile generato con npm@11, runner usa npm@10 di default

examples/documentazione/release-github.yml

@@ -0,0 +1,30 @@
+# Copia in: .gitea/workflows/release.yml
+# Trigger: git tag v* → build Docker + crea release Gitea
+#
+# NOTA: auto-release attende docker-release via needs.
+# Workaround Gitea bug #31900: token esplicito nel checkout di auto-release.yml.
+#
+# Secrets richiesti nel repository consumer:
+#   NPM_TOKEN   — accesso registry @pzeta (npm install + Docker secret)
+#   G_USER      — username Docker registry Gitea
+
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  docker-release:
+    runs-on: catthehacker-latest  # workaround Gitea bug #34986: runs-on non rispettato in workflow_call
+    uses: https://gitea.pzetatouch.it/devops/shared-actions/.gitea/workflows/docker-release-github.yml@v1
+    secrets: inherit
+    with:
+      runner: catthehacker-latest  # runner con Docker pre-installato
+      npm-version: '11'   # lockfile generato con npm@11, runner usa npm@10 di default
+
+  auto-release:
+    needs: [docker-release]
+    uses: https://gitea.pzetatouch.it/devops/shared-actions/.gitea/workflows/auto-release-github.yml@v1
+    secrets: inherit