enh: add static analysis with pyright (#171)

Author: kyteinsky

.github/CODEOWNERS

@@ -1,4 +1,4 @@
 # SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
 # SPDX-License-Identifier: AGPL-3.0-or-later
 # App maintainers
-/appinfo/info.xml    @kyteinsky @marcelklehr
+*       @kyteinsky @marcelklehr

.github/workflows/static-analysis.yml

@@ -0,0 +1,93 @@
+# SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+name: Static Analysis
+
+on:
+  pull_request:
+    branches:
+      - master
+  push:
+    branches:
+      - master
+
+permissions:
+  contents: read
+
+concurrency:
+  group: static-analysis-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  changes:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: read
+
+    outputs:
+      src: ${{ steps.changes.outputs.src}}
+
+    steps:
+      - uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
+        id: changes
+        continue-on-error: true
+        with:
+          filters: |
+            src:
+              - 'main.py'
+              - 'main_em.py'
+              - 'config.cpu.yaml'
+              - 'config.gpu.yaml'
+              - 'context_chat_backend/**'
+              - 'appinfo/**'
+              - 'example.env'
+              - 'hwdetect.sh'
+              - 'persistent_storage/**'
+              - 'project.toml'
+              - 'requirements.txt'
+              - 'logger_config.yaml'
+              - '.github/workflows/static-analysis.yml'
+
+  analysis:
+    runs-on: ubuntu-latest
+
+    needs: changes
+    if: needs.changes.outputs.src != 'false'
+
+    steps:
+      - name: Checkout CCB
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+
+      - name: Setup python 3.11
+        uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5
+        with:
+          python-version: '3.11'
+          cache: 'pip'
+          cache-dependency-path: |
+            requirements.txt
+            requirements_dev.txt
+
+      - name: Install dependencies
+        run: |
+          pip install --upgrade pip setuptools wheel
+          pip install -r requirements_dev.txt
+
+      - name: Static analysis with pyright
+        run: |
+          pyright
+
+  summary:
+    permissions:
+      contents: none
+    runs-on: ubuntu-latest-low
+    needs: [changes, analysis]
+
+    if: always()
+
+    # This is the summary, we just avoid to rename it so that branch protection rules still match
+    name: static-analysis
+
+    steps:
+      - name: Summary status
+        run: if ${{ needs.changes.outputs.src != 'false' && needs.analysis.result != 'success' }}; then exit 1; fi