Improve PSL parser unicode and wildcard handling

[digilob]

Summary

• Squashes prior multi-commit history into a single clean commit
• Improves PSL parser behavior for unicode/punycode parsing and wildcard/exception handling
• Expands test coverage for unicode scripts, wildcard/exception rules, comments, and private domains

Validation

• Focused PSL test suite passed in local verification

[Copilot]

Pull request overview

This PR improves Public Suffix List (PSL) parsing behavior around Unicode/punycode handling and expands unit test coverage for Unicode scripts, wildcard/exception rules, comment/empty-line skipping, and private-domain section parsing.

Changes:

• Update PSL parsing to attempt punycode insertion using IDN.toASCII(..., IDN.ALLOW_UNASSIGNED) and warn (instead of failing) when conversion throws.
• Expand PslDataParserTest with parameterized tests covering Unicode scripts, wildcards/exceptions, comments/empty lines, and private domains.
• Refactor test imports to support the expanded assertions and parameterized test infrastructure.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
library/src/main/java/com/digicert/validation/psl/PslDataParser.java	Adds punycode conversion flags and warning behavior on conversion failures.
library/src/test/java/com/digicert/validation/psl/PslDataParserTest.java	Adds parameterized tests for Unicode, wildcards/exceptions, comments, and private domain sections.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.