Configure flake8 to only lint project files

Flake8 was scanning all files including third-party dependencies,
causing false positive errors. Now only scans python-examples/ directory.

Author: cursoragent

.github/workflows/test.yml

@@ -49,5 +49,5 @@ jobs:
 
     - name: Lint with flake8
       run: |
-        uv run flake8 --count --select=E9,F63,F7,F82 --show-source --statistics
-        uv run flake8 --count --exit-zero --max-complexity=10 --max-line-length=100 --statistics
+        uv run flake8 python-examples/ --count --select=E9,F63,F7,F82 --show-source --statistics
+        uv run flake8 python-examples/ --count --exit-zero --max-complexity=10 --max-line-length=100 --statistics