chore(publish): cut Maven Central file and release counts (#50)

Upgrade vanniktech-maven-publish to 0.37.0, whose defaults publish only
md5/sha1 checksums and drop the redundant signature checksums and
sha256/sha512 (~380 -> ~152 files per release). Fix the removed
SonatypeHost API by calling publishToMavenCentral() with no argument.

Derive the publish version from the git tag so pre-release tags
(X.Y.Z-rcN) publish an overwriting X.Y.Z-SNAPSHOT to the separate,
quota-exempt snapshot repository instead of a full release; clean X.Y.Z
tags still release.

Author: rossdanderson

buildSrc/src/main/kotlin/common-maven.gradle.kts

@@ -1,15 +1,15 @@
-import com.vanniktech.maven.publish.SonatypeHost.Companion.CENTRAL_PORTAL
-
 plugins { id("com.vanniktech.maven.publish") }
 
 group = "com.caplin.integration.datasourcex"
 
-val configuredVersion = System.getenv("GITHUB_REF_NAME") ?: "dev"
+val refName = System.getenv("GITHUB_REF_NAME") ?: "dev"
 
-version = configuredVersion
+// Pre-release tags (X.Y.Z-rcN) publish as an overwriting SNAPSHOT to stay under Maven Central's
+// monthly release/file limits; a clean X.Y.Z tag publishes a release. See docs/adr/0002.
+version = if (refName.contains('-')) "${refName.substringBefore('-')}-SNAPSHOT" else refName
 
 mavenPublishing {
-  publishToMavenCentral(CENTRAL_PORTAL)
+  publishToMavenCentral()
 
   signAllPublications()
 

gradle/libs.versions.toml

@@ -24,7 +24,7 @@ spotless-plugin = "8.6.0"
 dokka-plugin = "2.2.0"
 binary-compatibility-validator-plugin = "0.18.1"
 kover-plugin = "0.9.8"
-vanniktech-maven-publish-plugin = "0.31.0"
+vanniktech-maven-publish-plugin = "0.37.0"
 spring-dependency-management-plugin = "1.1.7"