Fix bom build order

Author: kabir

boms/extras/pom.xml

@@ -57,6 +57,16 @@
         </dependencies>
     </dependencyManagement>
 
+    <!-- Declare actual dependency on SDK BOM so Maven reactor understands build order -->
+    <dependencies>
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>a2a-java-sdk-bom</artifactId>
+            <version>${project.version}</version>
+            <type>pom</type>
+        </dependency>
+    </dependencies>
+
     <build>
         <plugins>
             <plugin>

boms/reference/pom.xml

@@ -68,6 +68,16 @@
         </dependencies>
     </dependencyManagement>
 
+    <!-- Declare actual dependency on SDK BOM so Maven reactor understands build order -->
+    <dependencies>
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>a2a-java-sdk-bom</artifactId>
+            <version>${project.version}</version>
+            <type>pom</type>
+        </dependency>
+    </dependencies>
+
     <build>
         <plugins>
             <plugin>

pom.xml

@@ -464,10 +464,10 @@
         <module>transport/grpc</module>
         <module>transport/rest</module>
 
-        <!-- BOMs - must be built AFTER modules they test -->
+        <!-- BOMs - build order automatically determined by reactor based on dependencies -->
         <module>boms/extras</module>
-        <module>boms/sdk</module>
         <module>boms/reference</module>
+        <module>boms/sdk</module>
     </modules>
 
     <profiles>