Merge branch 'main' into fix/memory-leak-delete-session

Author: YuqiGuo105

.devcontainer/devcontainer.json

@@ -0,0 +1,28 @@
+{
+  "name": "Java 17",
+  "image": "mcr.microsoft.com/devcontainers/java:1-17-bullseye",
+  "features": {
+    "ghcr.io/devcontainers/features/github-cli:1": {},
+    "ghcr.io/devcontainers/features/git-lfs:1": {}
+  },
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "extension-pack-for-java",
+        "redhat.vscode-xml",
+        "rangav.vscode-thunder-client"
+      ],
+      "settings": {
+        "java.jdt.download.server": "latest",
+        "java.help.firstView": "none",
+        "java.showBuildStatusOnStart": "notification",
+        "java.configuration.updateBuildConfiguration": "interactive",
+        "java.autobuild.enabled": true,
+        "terminal.integrated.focusOnOutput": false
+      }
+    }
+  },
+  "remoteUser": "vscode",
+  "forwardPorts": [8000, 8080, 8081, 8082],
+  "postCreateCommand": "git config --global credential.helper '!gh auth git-credential' && git config --global lfs.locksverify false"
+}

a2a/pom.xml

@@ -20,7 +20,6 @@
     <google.adk.version>${project.version}</google.adk.version>
     <guava.version>33.0.0-jre</guava.version>
     <jackson.version>2.19.0</jackson.version>
-    <rxjava.version>3.1.5</rxjava.version>
     <jspecify.version>1.0.0</jspecify.version>
     <slf4j.version>2.0.17</slf4j.version>
     <truth.version>1.4.4</truth.version>
@@ -52,6 +51,11 @@
       <artifactId>jackson-databind</artifactId>
       <version>${jackson.version}</version>
     </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.datatype</groupId>
+      <artifactId>jackson-datatype-jsr310</artifactId>
+      <version>${jackson.version}</version>
+    </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.module</groupId>
       <artifactId>jackson-module-parameter-names</artifactId>
@@ -60,7 +64,6 @@
     <dependency>
       <groupId>io.reactivex.rxjava3</groupId>
       <artifactId>rxjava</artifactId>
-      <version>${rxjava.version}</version>
     </dependency>
     <dependency>
       <groupId>org.jspecify</groupId>