* feat(memory): add deterministic near-duplicate fact gate
Add an opt-in write-side gate for DeerMem (issue #5252): a proposed NEW
fact whose bounded token-Jaccard similarity to an existing fact in the
same user/agent scope AND category reaches
fact_dedup_similarity_threshold merges into that fact instead of being
appended — the existing id/content/createdAt are kept, confidence is
raised to the maximum, and the source is refreshed, with one
facts_merged_dedup metric increment recording the merge.
Defaults preserve the legacy behavior exactly; targeted updates by fact
id and the exact-content key check are untouched. Companion write-side
step to the read-side relevance/diversity work in #5251.
Refs #5252
Signed-off-by: pwd11 <fvdsrc@163.com>
* fix(memory): preserve corrections during fact deduplication
Signed-off-by: pwd11 <fvdsrc@163.com>
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Signed-off-by: pwd11 <fvdsrc@163.com>
Co-authored-by: Willem Jiang <willem.jiang@gmail.com>
