feat(sql): support querying local files as database tables

[LINxiansheng]

Task Description

feat(sql): support querying local files as database tables

Solution Description

1. add FILE_SCAN, FILE_LIST and FILE_SCHEMA table syntax
2. support CSV, JSONL and native Parquet scanning
3. add schema inference, column projection and vectorized execution
4. enforce enable_file_sql and secure_file_priv security checks
5. add file mutation, symlink and resource-limit protection
6. add parser and file scan unit tests

Passed Regressions

core test

Upgrade Compatibility

Other Information

• Related links: [DIMA-2026073100117912055](

Release Note

[LINxiansheng]

The mapping Dima issue is [file as database](