Merge JoinMarket-Org/joinmarket-clientserver#1649: Add GitHub CodeQL code scanning

8e6eca8121 Add CodeQL code scanning (Kristaps Kaupe)

Pull request description:

  Add [GitHub CodeQL](https://docs.github.com/en/code-security/code-scanning/introduction-to-code-scanning/about-code-scanning-with-codeql) code scanning.

  #1648 was already found while testing it.

Top commit has no ACKs.

Tree-SHA512: dd7ca6b21d13f0a1022a613f6f4e0184d17f9a7cd176e7d26060fdc39344b28237f77d1c4be439b96327b528688bb91dd1813c53db769047a39cad0abcd18e31

.github/workflows/codeql.yml

@@ -0,0 +1,36 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+  schedule:
+    - cron: '0 3 * * 1'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: 'ubuntu-latest'
+    timeout-minutes: 360
+    permissions:
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'python' ]
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v3
+      with:
+        languages: ${{ matrix.language }}
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v3
+      with:
+        category: "/language:${{matrix.language}}"