PYTHON-5488 append_metadata should not add duplicates (#2461) [v4.14]#2483

blink1073 merged 1 commit into

v4.14mongodb/mongo-python-driver:v4.14from

cherry-pick-v4.14-2a1523fa85b4d6d0c4ea55decebd22fb6dfb5f24mongodb/mongo-python-driver:cherry-pick-v4.14-2a1523fa85b4d6d0c4ea55decebd22fb6dfb5f24Copy head branch name to clipboard