test(crypto+db+cli): add master key, crypto, credentials_repo, and CLI tests

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_schema_migration.py

@@ -130,13 +130,14 @@ class TestFreshSchema:
             assert "default_auth_strategy" in cols_plat
             cols_cred = _column_names(conn, "credentials")
             assert "account_id" in cols_cred
+            assert "secret_ciphertext" in cols_cred
             cur = conn.cursor()
             cur.execute(
                 "SELECT value FROM _schema_meta WHERE key = ?",
                 ("schema_version",),
             )
             row = cur.fetchone()
-            assert row is not None and row[0] == "2"
+            assert row is not None and row[0] == "2.1"
         finally:
             conn.close()