fix(security): update dependency ajv to v8.18.0 [security] (#415)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [ajv](https://ajv.js.org)
([source](https://redirect.github.com/ajv-validator/ajv)) | [`8.17.1` →
`8.18.0`](https://renovatebot.com/diffs/npm/ajv/8.17.1/8.18.0) |
![age](https://developer.mend.io/api/mc/badges/age/npm/ajv/8.18.0?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/ajv/8.17.1/8.18.0?slim=true)
|

### GitHub Vulnerability Alerts

#### [CVE-2025-69873](https://nvd.nist.gov/vuln/detail/CVE-2025-69873)

ajv (Another JSON Schema Validator) through version 8.17.1 is vulnerable
to Regular Expression Denial of Service (ReDoS) when the `$data` option
is enabled. The pattern keyword accepts runtime data via JSON Pointer
syntax (`$data` reference), which is passed directly to the JavaScript
`RegExp()` constructor without validation. An attacker can inject a
malicious regex pattern (e.g., `\"^(a|a)*$\"`) combined with crafted
input to cause catastrophic backtracking. A 31-character payload causes
approximately 44 seconds of CPU blocking, with each additional character
doubling execution time. This enables complete denial of service with a
single HTTP request against any API using ajv with `$data`: true for
dynamic schema validation.

---

### Release Notes

<details>
<summary>ajv-validator/ajv (ajv)</summary>

###
[`v8.18.0`](https://redirect.github.com/ajv-validator/ajv/releases/tag/v8.18.0)

[Compare
Source](https://redirect.github.com/ajv-validator/ajv/compare/v8.17.1...v8.18.0)

#### What's Changed

- feat: allow tree-shaking by adding `"sideEffects": false` to
`package.json` by
[@&#8203;josdejong](https://redirect.github.com/josdejong) in
[#&#8203;2480](https://redirect.github.com/ajv-validator/ajv/pull/2480)
- fix:
[#&#8203;2482](https://redirect.github.com/ajv-validator/ajv/issues/2482)
Infinity and NaN serialise to null by
[@&#8203;jasoniangreen](https://redirect.github.com/jasoniangreen) in
[#&#8203;2487](https://redirect.github.com/ajv-validator/ajv/pull/2487)
- fix: small grammatical error in managing-schemas.md by
[@&#8203;monteiro-renato](https://redirect.github.com/monteiro-renato)
in
[#&#8203;2508](https://redirect.github.com/ajv-validator/ajv/pull/2508)
- fix: typos in schema-language.md by
[@&#8203;monteiro-renato](https://redirect.github.com/monteiro-renato)
in
[#&#8203;2507](https://redirect.github.com/ajv-validator/ajv/pull/2507)
- fix(pattern): use configured RegExp engine with $data keyword to
mitigate ReDoS attacks (CVE-2025-69873) by
[@&#8203;epoberezkin](https://redirect.github.com/epoberezkin) in
[#&#8203;2586](https://redirect.github.com/ajv-validator/ajv/pull/2586)

#### New Contributors

- [@&#8203;josdejong](https://redirect.github.com/josdejong) made their
first contribution in
[#&#8203;2480](https://redirect.github.com/ajv-validator/ajv/pull/2480)
- [@&#8203;monteiro-renato](https://redirect.github.com/monteiro-renato)
made their first contribution in
[#&#8203;2508](https://redirect.github.com/ajv-validator/ajv/pull/2508)

**Full Changelog**:
<ajv-validator/ajv@v8.17.1...v8.18.0>

</details>

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