Add global httpx.ReadTimeout handler for memory tests

Use pytest hook to catch httpx.ReadTimeout and skip tests instead of
failing. This handles flaky network timeouts from HuggingFace Hub
during sentence-transformers model downloads in CI.

The hook covers all tests in tests/test_memory/ directory.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/test_memory/conftest.py

@@ -6,3 +6,30 @@ from __future__ import annotations
 import os
 
 os.environ["TOKENIZERS_PARALLELISM"] = "false"
+
+import pytest
+
+# Import httpx for type checking (will be available since it's a dependency)
+try:
+    import httpx
+
+    HTTPX_AVAILABLE = True
+except ImportError:
+    HTTPX_AVAILABLE = False
+
+
+@pytest.hookimpl(hookwrapper=True)
+def pytest_runtest_call(item):
+    """Wrap test execution to catch httpx.ReadTimeout and skip instead of fail.
+
+    This handles flaky network timeouts that occur when:
+    - HuggingFace Hub is slow during model downloads (sentence-transformers)
+    - External embedding APIs timeout
+    - Network connectivity issues in CI
+    """
+    outcome = yield
+
+    if HTTPX_AVAILABLE and outcome.excinfo is not None:
+        exc_type, exc_value, exc_tb = outcome.excinfo
+        if isinstance(exc_value, httpx.ReadTimeout):
+            pytest.skip("Skipped due to network timeout (flaky CI)")