[global-index-eslib]use thin packaging and fix pom bundle,fix query compatibility and vector metrics, and

[CrownChu]

Purpose

This is a follow-up to #8000. It fixes persisted full-text query compatibility and vector metric handling, and changes paimon-eslib to a thin JAR so that ESLib and Lucene classes are no longer bundled into the Apache artifact.

Changes

Thin packaging

• Remove the module-specific shading configuration that bundled ESLib and Lucene classes.
• Keep ESLib and Lucene as regular Maven dependencies.
• Resolve ESLib 1.0.6 artifacts from the public GitHub Maven repository.
• Document the runtime dependency requirements in paimon-eslib/README.md.

This change only separates the artifact boundary. It does not relicense ESLib or change its dependency license.

Persisted full-text query compatibility

• Accept the serialized column field as a routing hint when reading persisted SQL full-text predicates.
• Continue using the resolved physical index field for query execution.
• Add regression coverage for persisted predicates on complementary text fields.

Vector metric correctness

• Implement the VectorGlobalIndexer metric contract.
• Support canonical l2, cosine, and inner_product metric mappings.
• Use the metric persisted in each index shard instead of relying on the current table configuration.
• Reject searches across shards with inconsistent vector metrics.
• Convert Lucene vector scores to Paimon's expected score semantics.
• Close the reader when vector metric registration fails to avoid leaking resources.

Tests

mvn -pl paimon-eslib clean verify

Result:

Tests run: 70, Failures: 0, Errors: 0, Skipped: 0
BUILD SUCCESS

The generated paimon-eslib JAR was also verified not to contain ESLib or Lucene classes.

[JingsongLi]

+1