Mark the notebook tests as unit tests so CI actually runs them

The only pytest job on main is `uv run pytest -m unit -v`, so an unmarked test
file is silently deselected: 30 tests that look like coverage and execute never.
This has already happened once in this repo (#112 merged six tests that had
never run), which is why the root CLAUDE.md calls it out.

This branch predates the marker's introduction on main, so register `unit` in
pyproject.toml too — verbatim from main, so the two merge cleanly. Verified:
`pytest -m unit` now selects 30 and deselects 25.

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

Author: gaurav

pyproject.toml

@@ -34,6 +34,9 @@ packages = ["src"]
 # (including node_modules) during collection.
 testpaths = ["tests"]
 timeout = 300
+markers = [
+    "unit: unit tests that do not require network access",
+]
 
 [dependency-groups]
 dev = [

tests/log_analysis/test_nameres_log_notebook.py

@@ -19,6 +19,10 @@
 import pandas as pd
 import pytest
 
+# Without this the only pytest job in CI (`pytest -m unit`) deselects the whole
+# file, and it looks like passing coverage while testing nothing.
+pytestmark = pytest.mark.unit
+
 NOTEBOOK = (
     Path(__file__).parents[2] / "log-analysis" / "nameres" / "analyze_nameres_logs.py"
 )