[GenAI] Add support for org.snakeyaml:snakeyaml-engine:3.0.1 using gpt-5.5

[vjovanov]

What does this PR do?

Fixes: #2441

This PR introduces tests and metadata for org.snakeyaml:snakeyaml-engine:3.0.1, enabling support for this library.

Summary:

• Strategy: dynamic_access_main_sources_pi_gpt-5.5
• Agent: pi
• Model: gpt-5.5
• Input tokens: 257371
• Cached input tokens: 2031104
• Output tokens: 20737
• Entries: 0
• Iterations: 4
• Library coverage percentage: 54.68
• Generated lines of code: 260
• Tested library lines of code: 2743

Metadata Forge

• Forge branch: master
• Forge commit hash: 37c7ebae6e7dc60cd5f716b34be96fc522346b08

Stats from stats/<groupId>/<artifactId>/<metadata-version>/stats.json:

Dynamic access coverage:

• Overall: 0/0 covered calls (100.00%)

Library coverage:

• Instruction: 12133/22926 (52.92%)
• Line: 2743/5016 (54.68%)
• Method: 617/967 (63.81%)

[jormundur00]

Checked the PR scope, test quality, and CI/local validation for org.snakeyaml:snakeyaml-engine:3.0.1. The change stays scoped to one coordinate, the tests exercise library-specific native-image behavior without native-only skips or version-pinned assertions, and I found no blocking issues.