fix(oss): v3 entity cleanup, filter fixes, and QA hardening (TS + Python) (#4858)

Co-authored-by: Soumil Rathi <soumilrathi@gmail.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mem0-ts/src/oss/src/utils/entity_extraction.ts

@@ -660,6 +660,9 @@ export function extractEntities(text: string): ExtractedEntity[] {
     txt = txt.replace(/\s*:+$/, "");
     // Strip leading numbered list markers
     txt = txt.replace(/^\d+\s*\.\s*/, "");
+    // Strip trailing sentence punctuation (".", ",", ";", "!", "?") — otherwise
+    // "Paris." and "Paris" produce different embeddings and break entity dedup.
+    txt = txt.replace(/[.,;!?]+$/, "").trim();
 
     if (!txt || txt.length <= 2 || hasArtifacts(txt)) {
       continue;