build: scope -classfile lint exception to the Arrow-using modules

Previously disabled javac's classfile lint project-wide to dodge the
Apache Arrow @Value.Generated bytecode warning. Only integration and
performance actually compile against Arrow, so restore full -Xlint:all
(classfile included) in the parent and override just those two modules
with -Xlint:all,-classfile. Every other module now also enforces the
classfile category.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: dfa1

integration/pom.xml

@@ -154,6 +154,20 @@
 
 	<build>
 		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-compiler-plugin</artifactId>
+				<configuration>
+					<!-- This module compiles against Apache Arrow, whose classes carry
+					     @org.immutables.value.Generated in their bytecode without exporting
+					     the annotation jar — javac's classfile lint then warns about a
+					     dependency we don't own. Drop only that category here; every other
+					     lint stays strict via the parent's -Werror. -->
+					<compilerArgs combine.self="override">
+						<arg>-Xlint:all,-classfile</arg>
+					</compilerArgs>
+				</configuration>
+			</plugin>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-surefire-plugin</artifactId>

performance/pom.xml

@@ -103,6 +103,13 @@
 				<artifactId>maven-compiler-plugin</artifactId>
 				<configuration>
 					<release>25</release>
+					<!-- Benchmarks compile against Apache Arrow; its bytecode carries
+					     @org.immutables.value.Generated without the annotation jar, tripping
+					     javac's classfile lint on a dependency we don't own. Drop only that
+					     category; the parent's -Werror keeps every other lint strict. -->
+					<compilerArgs combine.self="override">
+						<arg>-Xlint:all,-classfile</arg>
+					</compilerArgs>
 					<annotationProcessorPaths>
 						<path>
 							<groupId>org.openjdk.jmh</groupId>

pom.xml

@@ -297,11 +297,7 @@
 						<showWarnings>true</showWarnings>
 						<failOnWarning>true</failOnWarning>
 						<compilerArgs>
-							<!-- All lint categories except classfile: that one only flags missing
-							     annotation class files inside third-party dependencies (e.g.
-							     org.immutables.value.Generated pulled in transitively), which we
-							     cannot fix and which says nothing about our own sources. -->
-							<arg>-Xlint:all,-classfile</arg>
+							<arg>-Xlint:all</arg>
 						</compilerArgs>
 					</configuration>
 				</plugin>