Validate tar members before archive extraction

[SylvainWinning]

Description

Validate tar archive members before extracting compressed directory evidence. The new validation rejects members that would write outside the generated extraction directory, including parent-directory paths, absolute paths, and link targets that escape the extraction root.

This keeps valid archives working while failing closed on unsafe archive entries.

Tests

• python3 -m unittest turbinia.processors.archive_test
• Local path traversal PoC now raises TurbiniaException before extraction

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[aarontp]

First pass look looks good, thanks! Letting the tests run and will look closer for final review after that.