Bump openai from 5.3.0 to 5.12.2

Bumps [openai](https://github.com/openai/openai-node) from 5.3.0 to 5.12.2.
- [Release notes](https://github.com/openai/openai-node/releases)
- [Changelog](https://github.com/openai/openai-node/blob/master/CHANGELOG.md)
- [Commits](openai/openai-node@v5.3.0...v5.12.2)

---
updated-dependencies:
- dependency-name: openai
  dependency-version: 5.12.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -52,7 +52,7 @@
     "express": "^5.1.0",
     "express-session": "^1.18.1",
     "marked": "^15.0.12",
-    "openai": "^5.3.0",
+    "openai": "^5.12.2",
     "picomatch": "^4.0.2",
     "zod": "^3.25.63"
   },