Add upper bound to pytest version constraint for better compatibility

Co-authored-by: jason810496 <[email protected]>

Author: Copilot

pyproject.toml

@@ -47,7 +47,7 @@ dev = [
     "psycopg2-binary>=2.9.9",
     "psycopg2cffi>=2.9.0",
     # testing
-    "pytest>=7.4.4",
+    "pytest>=7.4.4,<8.0",
     "pytest-lazy-fixture>=0.6.3",
     "pytest-cov>=5.0.0",
     "pytest-xdist>=3.6.1",