build(deps): bump the production group

Bumps the production group in /services/discord-gateway with 2 updates: [openai](https://github.com/openai/openai-node) and [zod](https://github.com/colinhacks/zod).


Updates `openai` from 7.10.0 to 7.15.0
- [Release notes](https://github.com/openai/openai-node/releases)
- [Changelog](https://github.com/openai/openai-node/blob/main/CHANGELOG.md)
- [Commits](https://github.com/openai/openai-node/compare/v7.10.0...v7.15.0)

Updates `zod` from 4.5.4 to 4.6.2
- [Release notes](https://github.com/colinhacks/zod/releases)
- [Commits](https://github.com/colinhacks/zod/compare/v4.5.4...v4.6.2)

---
updated-dependencies:
- dependency-name: openai
  dependency-version: 7.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production
- dependency-name: zod
  dependency-version: 4.6.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production
...

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

services/discord-gateway/package.json

@@ -31,7 +31,7 @@
     "ioredis": "^6.0.0",
     "libsodium-wrappers": "^0.8.4",
     "lru-cache": "^11.5.1",
-    "openai": "^7.10.0",
+    "openai": "^7.15.0",
     "opusscript": "^0.1.1",
     "p-limit": "^7.3.2",
     "p-retry": "^8.0.1",
@@ -42,7 +42,7 @@
     "sharp": "^0.35.4",
     "tiktoken": "^1.0.22",
     "ws": "^8.21.3",
-    "zod": "^4.5.4"
+    "zod": "^4.6.2"
   },
   "devDependencies": {
     "@biomejs/biome": "latest",