Refresh Spring Boot quickstart dependencies

[dex-the-ai]

Summary

• bump the Couchbase Java SDK from 3.11.1 to 3.12.0
• bump Lombok from 1.18.42 to 1.18.46
• bump springdoc-openapi-starter-webmvc-ui from 3.0.1 to 3.0.3

Verification

• ./mvnw -DskipTests versions:display-property-updates -DgenerateBackupPoms=false
• ./mvnw clean test -B ⚠️ fails on the local Couchbase sample-data cluster before and after these dependency bumps
• ./mvnw -q -DskipTests spring-boot:run
• GET /v3/api-docs ✅
• GET /swagger-ui/index.html ✅
• GET /api/v1/airport/list?limit=3&offset=0 ✅
• GET /api/v1/airline/list?limit=3&offset=0 ✅
• GET /api/v1/route/list?limit=3&offset=0 ✅
• GET /api/v1/airport/direct-connections?airportCode=SFO&limit=3&offset=0 ✅

Evidence

• Baseline main test run failed in AirportIntegrationTest.testListDirectConnections before any repo changes because the expected destination list no longer matched the local travel-sample results.
• The updated-branch test run still fails against the local cluster, now with several list-route cases surfacing Couchbase KV write timeouts while the suite exercises query/list endpoints.
• tutorial-maintenance/runs/java-springboot-quickstart/2026-06-09T0319Z/verification.md
• tutorial-maintenance/runs/java-springboot-quickstart/2026-06-09T0319Z/mvn-test.log
• tutorial-maintenance/runs/java-springboot-quickstart/2026-06-09T0319Z/walkthrough.txt
• tutorial-maintenance/runs/java-springboot-quickstart/2026-06-09T0319Z/app.log

Notes

• I kept this PR scoped to stable dependency bumps that versions:display-property-updates reported.
• The repo exposes Swagger UI, but I could not capture a screenshot/video in this host session because browser/screenshot tooling was unavailable.

[dex-the-ai]

Owner ping for this maintenance PR: @chedim

Requesting review from the manifest-listed owner(s) where GitHub does not already show a pending review request.

[gemini-code-assist]

Code Review

This pull request updates the dependency versions in pom.xml for Couchbase, Lombok, and Springdoc. There are no review comments, and we have no feedback to provide.

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