feat(data/smartphone): add Wikipedia URLs for 10 verified smartphones

[Seungpyo1007]

Closes #1

Summary

Cross-referenced unverified smartphone records (batch 4, 300 sampled records with no overlap against earlier batches) against English Wikipedia using exact heading matching and multi-spec verification safeguards.

Verification Results

• Evaluated: 300 sampled smartphone records across 128 brands
• CONFIRM: 10
• AMBIGUOUS: 4
• NOTFOUND: 281
• CONTRADICT: 5

Safeguard Details

• Exact heading match required (_heading_matches)
• Required at least 2 independent agreeing specifications (launch year alone is blocked)
• Hard-gated variant confusion filters (Pro, Max, Ultra, Mini, Lite, 4G vs 5G, etc.)
• Year-only confirms: 0
• Confirmed records:
  • Acer n35 -> https://en.wikipedia.org/wiki/Acer_N35
  • Fairphone 3 -> https://en.wikipedia.org/wiki/Fairphone_3
  • Nokia 9000 Communicator -> https://en.wikipedia.org/wiki/List_of_Nokia_products#4-digit_series
  • Palm VIIx -> https://en.wikipedia.org/wiki/Palm_VIIx
  • Siemens C10 -> https://en.wikipedia.org/wiki/Siemens_C10
  • Google Pixel C -> https://en.wikipedia.org/wiki/Google_Pixel_C
  • HMD Aura 2 -> https://en.wikipedia.org/wiki/HMD_Aura2
  • Microsoft Lumia 535 -> https://en.wikipedia.org/wiki/Microsoft_Lumia_535
  • Xiaomi Mi 2A -> https://en.wikipedia.org/wiki/Xiaomi_Mi_2A
  • Huawei G6600 Passport -> https://en.wikipedia.org/wiki/Huawei_G6600_Passport

GSMArena, PhoneDB, DeviceSpecifications, and Namuwiki were not requested.