T30: Fix edge CI Java version mismatch

Edge CI sets edgeDepsTest which compiles temporal-sdk targeting Java 21.
Our module hardcoded Java 17, causing Gradle to reject the dependency
at resolution time. Now uses 21 when edgeDepsTest is set, 17 otherwise.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: donald-pinckney

TASK_QUEUE.json

@@ -104,6 +104,16 @@
       "depends_on": [],
       "status": "completed",
       "notes": "Do in this PR, not a follow-up."
+    },
+    {
+      "id": "T30",
+      "title": "Fix CI: Edge build fails with Java version mismatch",
+      "description": "Edge CI sets edgeDepsTest which compiles temporal-sdk at Java 21. Our module hardcodes Java 17, causing Gradle to reject the dependency. Fix: use 21 when edgeDepsTest is set, 17 otherwise.",
+      "severity": "high",
+      "category": "bugfix",
+      "depends_on": [],
+      "status": "completed",
+      "notes": "Edge CI log showed: Dependency resolution is looking for a library compatible with JVM runtime version 17, but temporal-sdk is only compatible with JVM runtime version 21 or newer."
     }
   ]
 }

temporal-spring-ai/build.gradle

@@ -6,20 +6,26 @@ ext {
     springBootVersionForSpringAi = "$springBoot3Version"
 }
 
-// Spring AI requires Java 17+, override the default Java 8 target from java.gradle
+// Spring AI requires Java 17+, override the default Java 8 target from java.gradle.
+// When edgeDepsTest is set, use 21 to match other modules (avoids Gradle JVM compatibility rejection).
+ext {
+    springAiJavaVersion = project.hasProperty("edgeDepsTest") ? JavaVersion.VERSION_21 : JavaVersion.VERSION_17
+    springAiRelease = project.hasProperty("edgeDepsTest") ? '21' : '17'
+}
+
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    sourceCompatibility = springAiJavaVersion
+    targetCompatibility = springAiJavaVersion
 }
 
 compileJava {
     options.compilerArgs.removeAll(['--release', '8'])
-    options.compilerArgs.addAll(['--release', '17'])
+    options.compilerArgs.addAll(['--release', springAiRelease])
 }
 
 compileTestJava {
     options.compilerArgs.removeAll(['--release', '8'])
-    options.compilerArgs.addAll(['--release', '17'])
+    options.compilerArgs.addAll(['--release', springAiRelease])
 }
 
 dependencies {