Neutral wording in import docs; portable tool output paths

Import-surface docs and docstrings describe the automation as a
migration script; status-doc references in CHANGELOG/ADR-009/ROADMAP
point at repo files. Screenshot/verify tools write to /tmp/shopdb-shots
(created on import) instead of a machine-specific directory.

tests/test_smoke.py

@@ -1,7 +1,7 @@
 """Smoke tests pinning the baseline behavior of shopdb-flask.
 
 These eight tests are the safety net required before any structural
-refactor proceeds. See `~/.claude/skills/pinning-flask-behavior.md`.
+refactor proceeds.
 """
 
 import pytest