Upgrade build to Java 17 (LTS)

[devin-ai-integration]

Summary

Upgrades the Maven build from Java 9 to Java 17 (LTS). The source is already Java 17-compatible (no javax/sun imports; uses Optional.or()), so the change is confined to pom.xml: modernizing the compiler config and bumping plugin/dependency versions so the reactor builds cleanly on JDK 17.

Changes in pom.xml:

• maven-compiler-plugin 3.1 → 3.13.0, replacing <source>1.9</source>/<target>1.9</target> with <release>17</release>.
• JMH (jmh-core, jmh-generator-annprocess) 1.17.4 → 1.37 (older JMH's annotation processor fails on modern JDKs).
• maven-shade-plugin version pinned to 3.6.0 (was previously unpinned).

- maven-compiler-plugin 3.1   <source>1.9</source> <target>1.9</target>
+ maven-compiler-plugin 3.13.0 <release>17</release>
- jmh-core / jmh-generator-annprocess 1.17.4
+ jmh-core / jmh-generator-annprocess 1.37
- maven-shade-plugin (unpinned)
+ maven-shade-plugin 3.6.0

Validation

• mvn clean verify succeeds on Java 17 (openjdk 17.0.19), including JMH annotation processing and the shaded benchmarks.jar build.
• java -jar target/benchmarks.jar -l lists the benchmarks (e.g. lambdasinaction.chap7.ParallelStreamBenchmark.*), confirming the uber-jar's JMH manifest is intact.
• No JUnit tests exist under src/test, so surefire runs none. Per task scope, no CI workflows were added.

Link to Devin session: https://app.devin.ai/sessions/7161a2eb553044088f2aea1ca8953206
Requested by: @vibhaseshadri-cognition

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