Add OkHttp BOM to root POM for centralized dependency management (#305)

* Add OkHttp BOM to manage okhttp and mockwebserver versions

Co-authored-by: thomasturrell <1552612+thomasturrell@users.noreply.github.com>

* Remove OkHttp BOM from xapi-client/pom.xml - managed in root POM

Co-authored-by: thomasturrell <1552612+thomasturrell@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: thomasturrell <1552612+thomasturrell@users.noreply.github.com>
Co-authored-by: Thomas Turrell-Croft <thomasturrell@users.noreply.github.com>

Author: Copilot

pom.xml

@@ -21,6 +21,7 @@
     <checkstyle.version>10.6.0</checkstyle.version>
     <lifecycle-mapping.version>1.0.0</lifecycle-mapping.version>
     <jjwt.version>0.12.6</jjwt.version>
+    <okhttp.version>5.3.0</okhttp.version>
   </properties>
   <organization>
     <name>Berry Cloud Ltd</name>
@@ -259,6 +260,13 @@
   </build>
   <dependencyManagement>
     <dependencies>
+      <dependency>
+        <groupId>com.squareup.okhttp3</groupId>
+        <artifactId>okhttp-bom</artifactId>
+        <version>${okhttp.version}</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
       <dependency>
         <groupId>dev.learning.xapi</groupId>
         <artifactId>xapi-model</artifactId>

xapi-client/pom.xml

@@ -12,18 +12,6 @@
   <name>xAPI Client</name>
   <description>learning.dev xAPI Client</description>
 
-  <dependencyManagement>
-    <dependencies>
-      <dependency>
-        <groupId>com.squareup.okhttp3</groupId>
-        <artifactId>okhttp-bom</artifactId>
-        <version>4.12.0</version>
-        <type>pom</type>
-        <scope>import</scope>
-      </dependency>
-    </dependencies>
-  </dependencyManagement>
-
   <dependencies>
     <dependency>
       <groupId>org.springframework.boot</groupId>