Add CodeQL scanning for Python (#249)

* Add CodeQL scanning workflow for Python

Uses the default query suite (not security-extended) and excludes
tests/docs/dist from analysis to keep initial findings low-noise.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

* Bump codeql-action to v4

v3 is slated for deprecation in December 2026.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

* Restore actions-workflow scanning, drop unused path exclusions

Default setup was scanning both python and actions languages; the
python-only advanced workflow silently dropped actions coverage
(which previously caught a real missing-workflow-permissions alert).
The tests/docs/dist exclusions weren't preventing any actual findings
- all historical alerts are in nameparser/config/regexes.py - so drop
that config file rather than carry unused maintenance.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>

Author: derek73

.github/workflows/codeql.yml

@@ -0,0 +1,30 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+  schedule:
+    - cron: '30 4 * * 1'
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+
+    steps:
+    - uses: actions/checkout@v7
+
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v4
+      with:
+        languages: python, actions
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v4