Feature/new cpp interface

[hongzhi-gao]

1. Implement new cpp tree-model interface. Tested in TEST_F(TsFileTreeReaderTest, ExtendedRowsAndColumnsTest)
2. Renamed Java-Edition recordIterator() to iterator()
3. Marked get_device_schema interface with existing bug

[Copilot]

Pull Request Overview

This PR refactors the method for obtaining an iterator from a ResultSet by renaming recordIterator() to iterator() and adds new tree-view reader/writer classes for C++. The changes improve API consistency by aligning with standard iterator naming conventions.

Key changes:

• Renamed ResultSet.recordIterator() to ResultSet.iterator() in both Java and C++ implementations
• Added new TsFileTreeWriter and TsFileTreeReader classes for C++ to support hierarchical time-series data
• Introduced ResultSetIterator class in C++ with smart pointer support
• Refactored internal row_record_ field management across ResultSet implementations

Reviewed Changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
java/tsfile/src/main/java/org/apache/tsfile/read/query/dataset/ResultSet.java	Renamed interface method from recordIterator() to iterator()
java/tsfile/src/main/java/org/apache/tsfile/read/query/dataset/TreeResultSet.java	Updated implementation to match renamed interface method
java/tsfile/src/main/java/org/apache/tsfile/read/query/dataset/TableResultSet.java	Updated implementation to match renamed interface method
java/tsfile/src/test/java/org/apache/tsfile/read/query/ResultSetTest.java	Updated test to use renamed method
java/tsfile/src/test/java/org/apache/tsfile/read/TsFileTreeReaderTest.java	Updated test to use renamed method
java/examples/src/main/java/org/apache/tsfile/v4/TsFileTreeReaderExample.java	Updated example to use renamed method
cpp/src/reader/result_set.h	Added ResultSetIterator class and moved row_record_ field to base class
cpp/src/reader/qds_without_timegenerator.h	Removed duplicate row_record_ field
cpp/src/reader/qds_with_timegenerator.h	Removed duplicate row_record_ field
cpp/src/reader/table_result_set.h	Removed duplicate row_record_ field and unused include
cpp/src/writer/tsfile_tree_writer.h	New file providing tree-structured writer interface
cpp/src/writer/tsfile_tree_writer.cc	Implementation of TsFileTreeWriter
cpp/src/reader/tsfile_tree_reader.h	New file providing tree-structured reader interface
cpp/src/reader/tsfile_tree_reader.cc	Implementation of TsFileTreeReader
cpp/src/writer/tsfile_writer.h	Added write_tree() methods for Tablet and TsRecord
cpp/src/writer/tsfile_writer.cc	Implementation of write_tree() methods
cpp/src/reader/tsfile_reader.h	Added get_all_device_ids() method
cpp/src/reader/tsfile_reader.cc	Implementation of get_all_device_ids()
cpp/src/common/record.h	Added alternative constructor for TsRecord
cpp/test/reader/tree_view/tsfile_reader_tree_test.cc	New test file for tree reader functionality

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[Copilot]

Incomplete license text: 'License a' should be 'License at'.

Suggested change

	* with the License. You may obtain a copy of the License a
	* with the License. You may obtain a copy of the License at

[Copilot]

This should call write_tree(record) instead of write_record(record) to be consistent with the Tablet overload (line 42) and to properly handle aligned vs non-aligned records. The write_tree method checks the schema alignment and dispatches to the correct method.

Suggested change

	return tsfile_writer_->write_record(record);
	return tsfile_writer_->write_tree(record);

[hongzhi-gao]

fixed