chore: import upstream snapshot with attribution

pytest.ini

@@ -0,0 +1,44 @@
+[pytest]
+# Test discovery patterns
+python_files = test_*.py
+python_classes = Test*
+python_functions = test_*
+
+# Python path for imports
+pythonpath = . tests
+
+# Test paths
+testpaths = tests
+
+# Asyncio configuration
+asyncio_mode = auto
+
+# Output options
+addopts =
+    -v
+    --strict-markers
+    --tb=short
+    --disable-warnings
+
+# Markers
+markers =
+    asyncio: mark test as async
+    unit: mark test as unit test
+    integration: mark test as integration test
+    smoke: mark test as smoke test
+    slow: mark test as slow running
+    e2e: mark test as end-to-end test (requires real LangBot process)
+
+# Coverage options (when using pytest-cov)
+[coverage:run]
+source = langbot
+omit =
+    */tests/*
+    */test_*.py
+    */__pycache__/*
+    */site-packages/*
+
+[coverage:report]
+precision = 2
+show_missing = True
+skip_covered = False