bengbengbalabalabeng opened a new pull request, #1015:
URL: https://github.com/apache/fesod/pull/1015
## Purpose of the pull request
Related: #950
Replace duplicate `List<Integer> includeColumnIndexes` logic across read
handlers with a strategy-based `ColumnIndexResolver`.
## What's changed?
- Removed `ReadSheet#columnIndexes` and added
`ReadSheet#includeColumnIndexResolver`.
- Added `ReadSheetHolder#determineIncludedColumnIndex(columnIndex)` method.
- Added `ColumnIndexResolver.PASS_THROUGH`: Keep original column indices.
- Added `DefaultColumnIndexResolver`: Rewrite target columns’ internal
indexes to consecutive (0-based).
- Replace the original `List.indexOf()` lookup with `Map.get()` to improve
lookup efficiency and semantic clarity.
## Checklist
- [x] I have read the [Contributor
Guide](https://fesod.apache.org/community/contribution/).
- [x] I have written the necessary doc or comment.
- [x] I have added the necessary unit tests and all cases have passed.
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