fix packaging and imports and introduce tests with pytest.

still issues with celery worker.

application/tests/test_app.py

@@ -0,0 +1,37 @@
+from application.app import get_vectorstore
+
+
+# Test cases for get_vectorstore function
+def test_no_active_docs():
+    data = {}
+    assert get_vectorstore(data) == ""
+
+
+def test_default_active_docs():
+    data = {"active_docs": "default"}
+    assert get_vectorstore(data) == ""
+
+
+def test_local_default_active_docs():
+    data = {"active_docs": "local/default"}
+    assert get_vectorstore(data) == ""
+
+
+def test_local_custom_active_docs():
+    data = {"active_docs": "local/custom_index"}
+    assert get_vectorstore(data) == "indexes/local/custom_index"
+
+
+def test_remote_active_docs():
+    data = {"active_docs": "remote_index"}
+    assert get_vectorstore(data) == "vectors/remote_index"
+
+
+def test_active_docs_not_in_data():
+    data = {"other_key": "value"}
+    assert get_vectorstore(data) == ""
+
+
+def test_multiple_slashes_in_active_docs():
+    data = {"active_docs": "local/some/other/index"}
+    assert get_vectorstore(data) == "indexes/local/some/other/index"