Fix node_modules pollution between builds in parallel Maven execution

When building with -T6, multiple JS modules run yarn install concurrently.
The --mutex network flag serializes yarn processes, but if node_modules from
a previous build (or a different branch/version) is left on disk, yarn may
skip reinstalling packages — including devDependencies — treating the stale
state as up-to-date. This causes tools like tsc to be missing at build time.

Configure maven-clean-plugin to delete node_modules during mvn clean for
all JS modules (ui-ngx, msa/js-executor, msa/web-ui). Yarn restores from
its global cache (~/.cache/yarn), so the overhead is relinking only.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

msa/js-executor/pom.xml

@@ -96,6 +96,17 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-clean-plugin</artifactId>
+                <configuration>
+                    <filesets>
+                        <fileset>
+                            <directory>${basedir}/node_modules</directory>
+                        </fileset>
+                    </filesets>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-dependency-plugin</artifactId>

msa/web-ui/pom.xml

@@ -105,6 +105,17 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-clean-plugin</artifactId>
+                <configuration>
+                    <filesets>
+                        <fileset>
+                            <directory>${basedir}/node_modules</directory>
+                        </fileset>
+                    </filesets>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-dependency-plugin</artifactId>

ui-ngx/pom.xml

@@ -71,6 +71,17 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-clean-plugin</artifactId>
+                <configuration>
+                    <filesets>
+                        <fileset>
+                            <directory>${basedir}/node_modules</directory>
+                        </fileset>
+                    </filesets>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
     <profiles>