refactor: 빌드 최적화 및 ci 수정

src/adapter/outbound/persistence-mongo/build.gradle

@@ -1,10 +1,11 @@
+plugins {
+    id 'ca.spring-library'
+    id 'ca.spring-config'
+    id 'java-test-fixtures'
+}
+
 // Shared test code as a Gradle test-fixtures variant — ADR-BUILD-001. Applied here rather than
 // from the root, the way the GraphQL leaf does: only a leaf that has shared test code needs it.
-apply plugin: 'ca.spring-library'
-apply plugin: 'ca.spring-config'
-
-apply plugin: 'java-test-fixtures'
-
 // MongoDB Document Persistence Platform leaf — see
 // docs/superpowers/specs/2026-08-11-mongodb-document-persistence-platform-design.md (design package)
 // and docs/mongodb/repository-adaptation.md (how the design's 19 stable + 12 advanced library