fix(show): preserve versions for long source URLs

[harbinresearcher]

Pull Request Check List

Resolves: #2880

• Added tests for changed code.
• Updated documentation for changed code. (Not needed; no option or documented workflow changes.)

Description

poetry show calculates one version-column width from every displayed package. A direct URL or other source-qualified dependency can make that width larger than the terminal, causing Poetry to omit the version column for every package.

This change keeps the existing full version display as the first choice. If it does not fit, the formatter retries with aligned pretty_version values for the current and latest version columns before falling back to name-only output. --no-truncate still shows the complete source-qualified version, and JSON output is unchanged.

Testing

• .\.venv\Scripts\python.exe -m pytest tests\console\commands\test_show.py -q -n 0 — 86 passed
• .\.venv\Scripts\python.exe -m ruff check --no-fix src\poetry\console\commands\show.py tests\console\commands\test_show.py
• .\.venv\Scripts\python.exe -m ruff format --check src\poetry\console\commands\show.py tests\console\commands\test_show.py
• .\.venv\Scripts\python.exe -m mypy src\poetry\console\commands\show.py tests\console\commands\test_show.py
• .\.venv\Scripts\python.exe -m pre_commit run --files src\poetry\console\commands\show.py tests\console\commands\test_show.py

[sourcery-ai]

Hey - I've reviewed your changes and they look great!

Sourcery assessment

Approved.

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