PARQUET: Restore LICENSE and NOTICE files in packaged JARs

[kevinjqliu]

Rationale for this change

Part of #3687

ASF release policy requires JARs to include LICENSE and NOTICE under META-INF.
Note that this PR only adds the LICENSE and NOTICE files back to the jars. We still need to follow up and validate the content of those files.

Background

The shared ASF Maven parent (org.apache:apache:39) configures maven-remote-resources-plugin to generate LICENSE and NOTICE files and include them in each project’s JAR.

For example, parquet-avro and parquet-cli provide both files directly, while several other modules provide only one or neither. This results in inconsistent licensing metadata across the published JARs.

The skip=true configuration was introduced in #284 (commit 57694790) as part of the Cascading 3 changes.

What changes are included in this PR?

Remove skip=true from maven-remote-resources-plugin

Are these changes tested?

Yes manually.

59 local JARs total:

• 15 main
• 15 test
• 15 source
• 13 Javadoc
• 1 CLI runtime

Build all jars and validate each contains both LICENSE and NOTICE:

(
  set -euo pipefail

  ./mvnw clean verify source:jar-no-fork javadoc:jar -DskipTests

  expected=59
  count=0

  while IFS= read -r -d '' jar_file; do
    contents=$(jar tf "$jar_file")

    grep -qx 'META-INF/LICENSE' <<<"$contents" ||
      { echo "Missing META-INF/LICENSE: $jar_file"; exit 1; }

    grep -qx 'META-INF/NOTICE' <<<"$contents" ||
      { echo "Missing META-INF/NOTICE: $jar_file"; exit 1; }

    count=$((count + 1))
  done < <(
    # Exclude maven-shade-plugin backups and the local-only JMH uber-JAR;
    # neither is attached or published by Maven.
    find . -path '*/target/*.jar' -type f \
      ! -name 'original-*' \
      ! -name 'parquet-benchmarks.jar' \
      -print0
  )

  [[ "$count" -eq "$expected" ]] ||
    { echo "Expected $expected published JARs, found $count"; exit 1; }

  echo "Verified $count published JARs"
)

[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  01:41 min
[INFO] Finished at: 2026-07-26T12:24:50-07:00
[INFO] ------------------------------------------------------------------------
Verified 59 published JARs

Are there any user-facing changes?

No