fix(@mem0/community): upgrade @langchain/community to ^1.1.18 (CVE-2026-27795, CVE-2026-26019)

Bumps @langchain/community from ^0.3.36 to ^1.1.18 and @langchain/core from
^0.3.42 to ^1.1.27 to resolve two SSRF CVEs in RecursiveUrlLoader.

Resolves Dependabot alerts #496 and #538.

mem0-ts/src/community/package.json

@@ -75,8 +75,8 @@
     "typescript": "5.5.4"
   },
   "dependencies": {
-    "@langchain/community": "^0.3.36",
-    "@langchain/core": "^0.3.42",
+    "@langchain/community": "^1.1.18",
+    "@langchain/core": "^1.1.27",
     "axios": "^1.16.0",
     "mem0ai": "^2.1.8",
     "uuid": "^11.1.1",