fix(app-business-reviews): point tests/conftest.py at integration root

The previous conftest inserted the tests directory itself onto sys.path,
which is a no-op for the intended purpose of making the integration's
modules importable from test files. Insert the parent (integration root)
instead, matching the pattern from PRs #280, #289, #306, and #307.

Author: TheRealAgentK

app-business-reviews/tests/conftest.py

@@ -1,5 +1,5 @@
-import sys
 import os
+import sys
 
-# Allow 'from context import ...' to work when pytest runs from repo root
-sys.path.insert(0, os.path.dirname(__file__))
+# Put the integration root on sys.path so test files can use plain imports
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))