fix: bundle SLF4J runtime deps for GeometryMappingJob standalone JVM

deploy/scripts/run-tile-pipeline.sh

@@ -784,7 +784,7 @@ geometry_mapping() {
     GEOMETRY_MAPPING_CACHE_PATH="${cache_dir}/geometry_mapping.json" \
     GEOMETRY_MAPPING_REPORT_PATH="${cache_dir}/geometry_mapping_report.txt" \
     GEOMETRY_MAPPING_JSON_REPORT_PATH="${cache_dir}/geometry_mapping_report.json" \
-        java -cp "${jar}" global.tada.valhalla.traffic.sg.GeometryMappingJob \
+        java -cp "${jar}:/app/lib/*" global.tada.valhalla.traffic.sg.GeometryMappingJob \
         || job_exit_code=$?
 
     case "${job_exit_code}" in

docker/Dockerfile.prod

@@ -158,7 +158,7 @@ RUN MULTIARCH=$(gcc-13 -print-multiarch) && \
 RUN --mount=type=cache,target=/root/.gradle \
     cd src/bindings/java && \
     chmod +x gradlew && \
-    ./gradlew clean build -x buildNative -x test && \
+    ./gradlew clean build copyRuntimeDeps -x buildNative -x test && \
     echo "✅ Gradle JAR build complete"
 
 # ── Verify artifacts ─────────────────────────────────────────────────────────
@@ -262,6 +262,17 @@ RUN JAR=$(ls /tmp/jni-jars/valhalla-jni-*.jar | grep -v sources | grep -v javado
     chown valhalla:valhalla /app/valhalla-jni.jar && \
     rm -rf /tmp/jni-jars
 
+# Runtime dependencies for standalone JVM invocations.
+# The thin /app/valhalla-jni.jar above does not bundle transitive deps (SLF4J,
+# Kotlin stdlib, coroutines, org.json), so `java -cp /app/valhalla-jni.jar
+# GeometryMappingJob` in run-tile-pipeline.sh would fail with NoClassDefFoundError.
+# Gradle's `copyRuntimeDeps` task produces these jars at build/libs/runtime/.
+COPY --from=builder /build/src/bindings/java/build/libs/runtime/ /tmp/jni-runtime/
+RUN mkdir -p /app/lib && \
+    cp /tmp/jni-runtime/*.jar /app/lib/ && \
+    chown -R valhalla:valhalla /app/lib && \
+    rm -rf /tmp/jni-runtime
+
 COPY --from=builder --chown=valhalla:valhalla \
     /build/config \
     /app/config

src/bindings/java/build.gradle.kts

@@ -60,6 +60,10 @@ dependencies {
 
     // Logging
     implementation(libs.slf4j.api)
+    // Runtime binding for standalone JVM invocations (see `copyRuntimeDeps` below).
+    // Spring Boot consumers bring their own binding so this is `runtimeOnly`, not
+    // `implementation` — they don't see it on their compile/runtime classpath.
+    runtimeOnly(libs.slf4j.simple)
 
     // JSON parsing
     implementation(libs.json)
@@ -220,6 +224,23 @@ tasks.jar {
     isReproducibleFileOrder = true
 }
 
+// ============================================
+// Runtime Dependencies for Standalone JVM Use
+// ============================================
+// The published `valhalla-jni-*.jar` is thin — project classes + native libs only.
+// For standalone CLI invocations like `java -cp valhalla-jni.jar GeometryMappingJob`
+// (see deploy/scripts/run-tile-pipeline.sh) the transitive deps (SLF4J, Kotlin
+// stdlib, coroutines, org.json) must also be on the classpath. This task copies
+// runtime deps to build/libs/runtime/ so the Dockerfile can ship them under
+// /app/lib/. Invoked explicitly from Dockerfile.prod; not wired to `jar`/`assemble`
+// so downstream maven consumers don't pay for it.
+tasks.register<Copy>("copyRuntimeDeps") {
+    description = "Copies runtime dependencies to build/libs/runtime/ for Docker packaging."
+    group = "build"
+    from(configurations.runtimeClasspath)
+    into(layout.buildDirectory.dir("libs/runtime"))
+}
+
 // ============================================
 // Documentation (Dokka)
 // ============================================

src/bindings/java/gradle/libs.versions.toml

@@ -21,6 +21,7 @@ kotlin-stdlib = { module = "org.jetbrains.kotlin:kotlin-stdlib", version.ref = "
 kotlin-reflect = { module = "org.jetbrains.kotlin:kotlin-reflect", version.ref = "kotlin" }
 kotlinx-coroutines-core = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-core", version.ref = "coroutines" }
 slf4j-api = { module = "org.slf4j:slf4j-api", version.ref = "slf4j" }
+slf4j-simple = { module = "org.slf4j:slf4j-simple", version.ref = "slf4j" }
 json = { module = "org.json:json", version.ref = "json" }
 logback-classic = { module = "ch.qos.logback:logback-classic", version.ref = "logback" }
 junit-jupiter-api = { module = "org.junit.jupiter:junit-jupiter-api", version.ref = "junit" }