test: skip docs/ in memory-dir-paths sweep (#291)

The regression test from #290 walks the filesystem via Path.rglob, so
docs/plans/*.md files (gitignored, created by internal planning) trip
the assertion on any dev machine that has run ce:plan in this repo.
Fresh clones and CI never see them, but local runs fail.

Adding docs to skip_dirs keeps the guard narrow to first-class source
files while letting internal planning docs reference old paths
verbatim.

Co-authored-by: Matt Van Horn <455140+mvanhorn@users.noreply.github.com>

tests/test_version_consistency.py

@@ -37,7 +37,7 @@ class TestVersionConsistency(unittest.TestCase):
 
     def test_no_stray_hardcoded_memory_dir_paths(self) -> None:
         allowed_suffixes = {".md", ".py", ".sh", ".txt", ".yml", ".yaml", ".json"}
-        skip_dirs = {".git", "assets", "fixtures"}
+        skip_dirs = {".git", "assets", "fixtures", "docs"}
         offenders = []
 
         for path in ROOT.rglob("*"):