build(deps): bump io.micronaut.platform:micronaut-platform

Bumps [io.micronaut.platform:micronaut-platform](https://github.com/micronaut-projects/micronaut-platform) from 4.10.14 to 5.1.2.
- [Release notes](https://github.com/micronaut-projects/micronaut-platform/releases)
- [Commits](micronaut-projects/micronaut-platform@v4.10.14...v5.1.2)

---
updated-dependencies:
- dependency-name: io.micronaut.platform:micronaut-platform
  dependency-version: 5.1.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -9,7 +9,7 @@ base = "2026.3.1"
 jacoco = "0.8.14"
 jacocolog = "4.0.1"
 
-micronaut = "4.10.14"
+micronaut = "5.1.2"
 
 [libraries]
 openapi-processor-api = { module = "io.openapiprocessor:openapi-processor-api", version.ref = "api" }