Summary

• Add vanniktech/gradle-maven-publish-plugin v0.36.0 via buildSrc convention plugin
• Publish all 7 modules (core, postgres, mysql, http, kafka, spring-boot, bom) with unified versioning
• Tag-triggered publish job in ci.yml → Sonatype Central Portal
• Release-drafter for automatic GitHub Release notes (draft on push, publish on tag)

Pre-release checklist (before tagging v0.1.0)

• Verify with Adam: do org-level SONATYPE secrets work with Central Portal API (vanniktech)?
• Verify namespace com.softwaremill covers com.softwaremill.okapi in Central Portal
• Run ./gradlew publishToMavenLocal to verify JARs and POM structure
• Optionally tag v0.1.0-RC1 to test the full CI pipeline

Test plan

• ./gradlew build — BUILD SUCCESSFUL
• ./gradlew ktlintCheck — PASS
• Publishing tasks registered (publishAndReleaseToMavenCentral)
• CI passes on this PR
• Tag-triggered publish verified (post-merge, via RC tag)