data(smartphone): import PhoneDB raw device variants (batch 1)

[Seungpyo1007]

Summary

Adds 2,661 variant-level smartphone records + 127 SoC seeds scraped from PhoneDB (phonedb.net), continuing the raw-import campaign. Each PhoneDB device id is one regional/storage variant, so these are variant-level records (distinct from the model-level GSMArena import). All records are raw seed (verified: false) with source_urls pointing at the exact device page.

Source & method

• Source: https://phonedb.net device pages (robots.txt permits — only /ad/ and one path are disallowed). Attribution via per-record source_urls.
• Throttled concurrent fetch; no CAPTCHA/Cloudflare bypass.
• Coverage skews recent — 2023: 768, 2024: 993, 2025: 501 — filling the post-2020 gap left by the older GSMArena source.
• Top brands: Samsung 629, Xiaomi 383, Oppo 256, Motorola 179, Apple 164, Huawei 158, Vivo 124, ZTE 86, …

Notes

• SoCs auto-seeded where missing (verified: false).
• Existing brands only; devices with brands not yet in data/brand were skipped (follow-up).
• Local validator passes (python -m app.validate).
• Data-only: the static site/public/v1 dump is left to the weekly-refresh pipeline.
• First batch of an ongoing PhoneDB import (resumable; ~22k device ids remain).

Relates to #1.

Closes #1