data(gpu): add remaining Kaggle GPU specs

[Seungpyo1007]

Summary

• add 58 additional GPU records from the Kaggle TechPowerUp export, all with verified: false
• split the import into legacy, ATI/AMD, and modern GPU commits for reviewable history
• regenerate the static public dump after the data changes

Import notes

• source: https://www.kaggle.com/datasets/ellimaaac/gpus-specs-from-1986-to-2026
• skipped existing slug/name matches to avoid reintroducing duplicate records
• skipped rows with missing required schema fields, duplicate candidate slugs, future-dated rows, and obvious invalid entries such as Fake Card
• all imported records remain unverified until manually reviewed against primary/vendor sources

Validation

• python -m app.validate
• python TechEngine\\integrity_check.py data --strict

Refs #1