data(smartphone): import PhoneDB smartphone batch

[Seungpyo1007]

Summary

• import 665 unverified smartphone records from the Kaggle PhoneDB-derived mobile phones specs dataset
• split the import across brand-focused commits instead of one giant data commit
• refresh the public v1 smartphone dump so homepage/API static data reports 1,399 smartphones and 7,730 total records
• keep noisy LG carrier-code rows and malformed Samsung/Nokia variants out of this batch

Changed data

• smartphones: +665
• source: https://www.kaggle.com/datasets/sady36/mobile-phones-specs
• verified: all newly added records are verified: false

Verification

• python -m app.validate
• python TechEngine\integrity_check.py data --strict
• cd site && npm.cmd run build
• git diff --check

Refs #1