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- python-dependency-check/outdated: audit in venv isolata (fix falsi positivi da runner ML)
- python-dependency-check/outdated: deduplica issue (commento invece di nuova issue)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

.gitea/workflows/python-quality-gates-github.yml

@@ -0,0 +1,65 @@
+name: Python Quality Gates
+
+on:
+  workflow_call:
+    inputs:
+      python-version:
+        type: string
+        default: '3.11'
+      install-extras:
+        description: 'Extras pip da installare (es: dev, test). Lasciare vuoto per solo requirements.txt'
+        type: string
+        default: 'dev'
+      working-directory:
+        description: 'Directory di lavoro se il progetto non è in root'
+        type: string
+        default: '.'
+
+jobs:
+  python-quality-gates:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ${{ inputs.working-directory }}
+    steps:
+      - name: Checkout
+        uses: https://github.com/actions/checkout@v6
+
+      - name: Setup Python
+        uses: https://github.com/actions/setup-python@v5.2.0
+        with:
+          python-version: ${{ inputs.python-version || '3.11' }}
+
+      - name: Cache pip
+        uses: https://github.com/actions/cache@v4
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-pip-${{ inputs.python-version }}-${{ hashFiles('**/pyproject.toml', '**/requirements*.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-${{ inputs.python-version }}-
+            ${{ runner.os }}-pip-
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          if [ -n "${{ inputs.install-extras }}" ]; then
+            pip install -e ".[${{ inputs.install-extras }}]"
+          elif [ -f requirements-dev.txt ]; then
+            pip install -r requirements-dev.txt
+          elif [ -f requirements.txt ]; then
+            pip install -r requirements.txt
+          else
+            pip install -e "."
+          fi
+
+      - name: Lint (ruff)
+        run: ruff check .
+
+      - name: Format check (ruff)
+        run: ruff format --check .
+
+      - name: Type check (mypy)
+        run: mypy .
+
+      - name: Test (pytest)
+        run: pytest --tb=short -q