feat: Migrate global index scan and file meta utilities#125
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Purpose
FileMetaUtils: converts and prepares commit/file metadata used by migration flows and global-index write tasks.include/paimon/migrate/file_meta_utils.hsrc/paimon/core/migrate/file_meta_utils.cppGlobalIndexWriteTask: builds write tasks that update global index files from indexed splits.src/paimon/core/global_index/global_index_write_task.cppGlobalIndexScanImpl: implements global index scan planning/execution for indexed table reads.src/paimon/core/global_index/global_index_scan_impl.hsrc/paimon/core/global_index/global_index_scan_impl.cppGlobalIndexScan: provides the scan entry point that wires table scan logic with global index scanning.src/paimon/core/global_index/global_index_scan.cppGlobalIndexEvaluator: defines predicate evaluation for global index scan results.src/paimon/core/global_index/global_index_evaluator.hGlobalIndexEvaluatorImpl: provides the concrete evaluator implementation for global index predicates.src/paimon/core/global_index/global_index_evaluator_impl.hsrc/paimon/core/global_index/global_index_evaluator_impl.cppIndexedSplitImpl: represents splits decorated with global-index metadata.src/paimon/core/global_index/indexed_split_impl.hGlobalIndexFileManager: manages global index file paths and related lifecycle metadata.src/paimon/core/global_index/global_index_file_manager.hTests
file_meta_utils_test.cpp: covers file metadata utility behavior.indexed_split_test.cpp: covers indexed split behavior.API and Format
Documentation
Generative AI tooling
Migrate-by: Codex