DBD::SQLite: implement REGEXP for PerlOnJava

先从 PerlOnJava DBI/SQLite 路径和随附的 SQLite 兼容层开始，然后通过 PerlOnJava DBI 使用系统 Perl 验证来运行针对性的回归测试。完成的标准是：已注册兼容的 REGEXP 行为，该回归测试在 JVM 和解释器后端上均通过，并且 Locale::Unicode::Data v1.9.0 使用 REGEXP 的测试通过，同时 Unicode 失败仍归在 issue #1374 下。

Summary

The bundled PerlOnJava SQLite compatibility layer does not provide the SQLite REGEXP function expected by Locale::Unicode::Data v1.9.0.

Reproduction

CPAN random tester run: 20260916-111623-23683

Distribution: Locale::Unicode::Data v1.9.0

The upstream test suite exercises queries such as:

field REGEXP(?)

Under PerlOnJava, these queries fail with:

DBI prepare failed: no such function: REGEXP

The failure is observed in the collations and unit_aliases paths, and also prevents the related timezone-format query from completing.

Expected result

The unchanged upstream suite passes under system Perl: 11 test files and 741 tests successful.

Actual result

PerlOnJava reports 17 failed subtests out of 741. The failures include the separate Unicode mojibake problem already tracked in issue #1374; this issue is specifically for the missing SQLite REGEXP function.

The failure reproduces through the PerlOnJava DBI/SQLite path and is independent of an external database service.

Impact

DBD::SQLite has 588 unique released CPAN distributions with runtime dependencies, including 118 released within the last three years. Representative recent dependants include DBIx-Lite, Database-Join, Finance-Tiller2QIF, HTTP-Cookies-Chrome, and Punk-Queue.

Acceptance criteria

• Add a focused, system-Perl-validated regression for a SQLite REGEXP query through PerlOnJava DBI.
• Implement or register compatible REGEXP behavior in the bundled SQLite layer.
• Verify Locale::Unicode::Data v1.9.0 passes its REGEXP-using tests on both JVM and interpreter backends.
• Keep Unicode decoding failures tracked separately under issue #1374.