build(deps): bump inversify from 7.11.0 to 8.1.0

Bumps [inversify](https://github.com/inversify/monorepo) from 7.11.0 to 8.1.0.
- [Release notes](https://github.com/inversify/monorepo/releases)
- [Changelog](https://github.com/inversify/monorepo/blob/main/docs/release.md)
- [Commits](https://github.com/inversify/monorepo/compare/inversify@7.11.0...inversify@8.1.0)

---
updated-dependencies:
- dependency-name: inversify
  dependency-version: 8.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

packages/backend/package.json

@@ -32,6 +32,6 @@
   },
   "dependencies": {
     "zod": "^4.4.2",
-    "inversify": "^7.11.0"
+    "inversify": "^8.1.0"
   }
 }