Memory._process_metadata_filters() renames OR→$or and NOT→$not, but
effective_filters also retains the original OR/NOT keys from the
deepcopy of input_filters. Without dedup, the same sub-conditions were
evaluated twice in the Qdrant filter.
Normalize the filter dict upfront so $or/$not/$and map to OR/NOT/AND
and only the first occurrence is kept. Also replace the fragile
value.get("contains") or value.get("icontains") pattern with explicit
key lookup, and add a logger.debug for icontains explaining that Qdrant
MatchText case sensitivity depends on full-text index configuration.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
