fix(deps): update dependency com.openai:openai-java to v4 (#401)

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<hr>

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
| [com.openai:openai-java](https://platform.openai.com/docs)
([source](https://redirect.github.com/openai/openai-java)) | `3.7.1` ->
`4.0.1` |
[![age](https://developer.mend.io/api/mc/badges/age/maven/com.openai:openai-java/4.0.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.openai:openai-java/3.7.1/4.0.1?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>openai/openai-java (com.openai:openai-java)</summary>

###
[`v4.0.1`](https://redirect.github.com/openai/openai-java/blob/HEAD/CHANGELOG.md#401-2025-10-01)

Full Changelog:
[v4.0.0...v4.0.1](https://redirect.github.com/openai/openai-java/compare/v4.0.0...v4.0.1)

##### Bug Fixes

- **api:** add status, approval\_request\_id to MCP tool call
([56ed867](https://redirect.github.com/openai/openai-java/commit/56ed86777a63590b79559e850ce1c34d0c0b9af0))

###
[`v4.0.0`](https://redirect.github.com/openai/openai-java/blob/HEAD/CHANGELOG.md#400-2025-09-30)

Full Changelog:
[v3.7.1...v4.0.0](https://redirect.github.com/openai/openai-java/compare/v3.7.1...v4.0.0)

##### ⚠ BREAKING CHANGES

- **api:** `ResponseFunctionToolCallOutputItem.output` and
`ResponseCustomToolCallOutput.output` now return `string |
Array<ResponseInputText | ResponseInputImage | ResponseInputFile>`
instead of `string` only. This may break existing callsites that assume
`output` is always a string.

##### Features

- **api:** Support images and files for function call outputs in
responses, BatchUsage
([de7a6c1](https://redirect.github.com/openai/openai-java/commit/de7a6c18862af4f94ce7bbc3a3ae447520be5880))

##### Bug Fixes

- **client:** remove duplicate outputAsJson function
([4718871](https://redirect.github.com/openai/openai-java/commit/4718871e7e281b0a75c914d013e3b644340d5c4b))

</details>

---

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gradle/libs.versions.toml

@@ -22,7 +22,7 @@ langchain4j = "1.7.1"
 mockk = "1.14.6"
 netty = "4.2.6.Final"
 nexusPublish = "2.0.0"
-openai = "3.7.1"
+openai = "4.0.1"
 openrewrite = "7.17.0"
 slf4j = "2.0.17"
 spotless = "8.0.0"