fix(ci): add pythonpath=["."] to pytest config

test_track_span_context.py uses 'from tests.conftest import
BASE_URL' which requires the tests/ directory to be importable as
a top-level package. On Python 3.10/3.11 (CI matrix) pytest's
rootdir discovery lands on the repo root rather than the tests/
directory, so 'tests' is not on sys.path and the import raises
ModuleNotFoundError at collection time, failing one test:

  FAILED tests/test_track_span_context.py::test_module_level_track_llm_output_tokens_optional
  ModuleNotFoundError: No module named 'tests'

On Python 3.14 the same code passes because pytest-asyncio /
hatchling pyproject discovery adds the repo root to sys.path.
3.10/3.11 don't get that for free.

Add 'pythonpath = ["."]' to [tool.pytest.ini_options] so all
Python versions in the supported matrix resolve 'tests' as a
top-level module.

Author: maltsev-dev

pyproject.toml

@@ -146,6 +146,12 @@ ignore = [
 asyncio_mode = "auto"
 testpaths = ["tests"]
 addopts = "--tb=short -q"
+# Make the tests/ directory importable as a top-level package so
+# tests can use `from tests.conftest import BASE_URL`. Without this,
+# `from tests.conftest` raises ModuleNotFoundError on Python 3.10/3.11
+# because pytest's rootdir discovery lands on the repo root rather
+# than the tests/ directory.
+pythonpath = ["."]
 
 [tool.coverage.run]
 source = ["src/nullrun"]