feat(01-02): wire build-logic into root settings + add spotless/flyway classloader hints

- settings.gradle.kts: includeBuild("build-logic") placed inside pluginManagement { } (PITFALL #9)
- build.gradle.kts: 2 new alias(...) apply false entries (spotless, flywayPlugin)
- Existing repositories, module includes, and 8 original apply-false entries preserved verbatim

build.gradle.kts

@@ -9,4 +9,6 @@ plugins {
     alias(libs.plugins.kotlinJvm) apply false
     alias(libs.plugins.kotlinMultiplatform) apply false
     alias(libs.plugins.ktor) apply false
+    alias(libs.plugins.spotless) apply false
+    alias(libs.plugins.flywayPlugin) apply false
 }

settings.gradle.kts

@@ -2,6 +2,7 @@ rootProject.name = "recipe"
 enableFeaturePreview("TYPESAFE_PROJECT_ACCESSORS")
 
 pluginManagement {
+    includeBuild("build-logic")
     repositories {
         google {
             mavenContent {