[lszskye]

Purpose

Improve test coverage for:

• Recursive decoding of ORC dictionary arrays inside Struct and Map fields during global index construction.
• StartsWith, EndsWith, Contains and Like predicates in global index scans.
• GlobalIndexScan creation with partition predicates and default/custom memory pools.
• Nested Struct and Map-key projection detection, including Variant access.
• Recursive List/Map pruning with added fields and Variant projections.
• Value-statistics filtering in CHANGELOG mode for lookup, full-compaction and input producers.

Tests

• GlobalIndexTest.TestWriteIndexDecodesNestedOrcDictionaries
• GlobalIndexTest.TestScanIndexWithPartitionPredicate
• NestedProjectionUtilsTest.PruneDataTypeNestedListMapWithAddedFieldAndVariantAccess
• NestedProjectionUtilsTest.HasNestedSubfieldProjectionVariantAccessReturnsFalse
• NestedProjectionUtilsTest.HasNestedSubfieldProjectionNestedStruct
• NestedProjectionUtilsTest.HasNestedSubfieldProjectionMapKey
• KeyValueFileStoreScanTest.TestChangelogValueFilterByProducer
• GlobalIndexTest.TestScanIndex with four string predicate checks.

API and Format

No changes to public APIs, storage formats or protocols.

Documentation

No documentation changes are needed. This PR only adds tests.

Generative AI tooling

Generated-by: OpenAI Codex (GPT-6)

[lxy-9602]

+1