⬆️(backend) bump lodash from 4.17.23 to 4.18.1 in /src/mail

Update indirect dependency to include latest fixes and improvements.

See release notes and commits for detailed changes.

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.23 to 4.18.1.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.23...4.18.1)

---
updated-dependencies:
- dependency-name: lodash
  dependency-version: 4.18.1
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

CHANGELOG.md

@@ -14,6 +14,10 @@ and this project adheres to
 - ✨(summary) add routes v2 for async STT and summary tasks  #1171
 - ✅(backend) add unit tests for JwtTokenService #1232
 
+### Changed
+
+- ⬆️(backend) bump lodash from 4.17.23 to 4.18.1 in /src/mail
+
 ### Fixed
 
 - ⬆️(dependencies) update aiohttp to v3.13.4 [SECURITY]

src/mail/package-lock.json

@@ -884,9 +884,9 @@
       }
     },
     "node_modules/lodash": {
-      "version": "4.17.23",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.23.tgz",
-      "integrity": "sha512-LgVTMpQtIopCi79SJeDiP0TfWi5CNEc/L/aRdTh3yIvmZXTnheWpKjSZhnvMl8iXbC1tFg9gdHHDMLoV7CnG+w==",
+      "version": "4.18.1",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.18.1.tgz",
+      "integrity": "sha512-dMInicTPVE8d1e5otfwmmjlxkZoUpiVLwyeTdUsi/Caj/gfzzblBcCE5sRHV/AsjuCmxWrte2TNGSYuCeCq+0Q==",
       "license": "MIT"
     },
     "node_modules/lower-case": {