fix(data): add source citations for 13 tablet/watch records

Upgrade uncited tablet/watch records from dataset-only provenance to
source-verified by confirming the stored specs field-by-field against
authoritative sources (Wikipedia infoboxes, manufacturer/GSMArena spec
pages) and setting verified:true. Existing dataset provenance URLs are
retained alongside the new sources. No value was invented.

Tablets (7):
- Samsung Galaxy Tab S11, Tab S11 Ultra (Wikipedia)
- Samsung Galaxy Tab S10 Ultra, Tab S10+ (Wikipedia)
- Samsung Galaxy Fold, Galaxy Z Fold 6 (Wikipedia)
- Amazon Kindle Fire (2011) (Amazon Fire tablet Wikipedia; already cited)

Watches (6):
- Google Pixel Watch 4 41mm, 45mm (Wikipedia; already cited)
- Samsung Galaxy Watch Ultra, Watch 7, Watch 6 (Wikipedia)

Value corrections to match the cited source (never invented):
- Microsoft Surface 2 os "Windows Mobile" -> "Windows RT 8.1"
- Galaxy Watch 7 storage_options [2,32] -> [32] (spurious 2 GB removed)
- Galaxy Watch 6 storage_options [2,16] -> [16] (spurious 2 GB removed)

Refs #296

Author: Seungpyo1007

data/tablet/amazon/2011/kindle-fire/amazon-kindle-fire-aitoolbuzz-689-1gb.json

@@ -8,7 +8,7 @@
   "battery_mah": 4400,
   "weight_g": 413.0,
   "os": "Android",
-  "verified": false,
+  "verified": true,
   "source_urls": [
     "https://en.wikipedia.org/wiki/Amazon_Fire_tablet",
     "https://aitoolbuzz.com/mobiles/amazon-kindle-fire"

data/tablet/microsoft/2013/surface-2/microsoft-surface-2-aitoolbuzz-5927-2gb.json

@@ -7,8 +7,8 @@
   "ram_gb": 2,
   "battery_mah": null,
   "weight_g": 675.9,
-  "os": "Windows Mobile",
-  "verified": false,
+  "os": "Windows RT 8.1",
+  "verified": true,
   "source_urls": [
     "https://aitoolbuzz.com/mobiles/microsoft-surface-2",
     "https://en.wikipedia.org/wiki/Microsoft_Surface_2",

data/tablet/samsung/2019/galaxy-fold/samsung-galaxy-fold-beridzeg45-5584-12gb.json

@@ -8,9 +8,10 @@
   "battery_mah": 4380,
   "weight_g": 276.0,
   "os": "Android",
-  "verified": false,
+  "verified": true,
   "source_urls": [
-    "https://www.gsmarena.com/samsung_galaxy_fold-9523.php"
+    "https://www.gsmarena.com/samsung_galaxy_fold-9523.php",
+    "https://en.wikipedia.org/wiki/Samsung_Galaxy_Fold"
   ],
   "variant": {
     "region": "global",

data/tablet/samsung/2024/galaxy-tab-s10-plus/samsung-galaxy-tab-s10-plus-allphones-6494-12gb-256gb-5g.json

@@ -8,9 +8,10 @@
   "battery_mah": 10090,
   "weight_g": 571.0,
   "os": "Android 14, One UI 6.1",
-  "verified": false,
+  "verified": true,
   "source_urls": [
-    "https://www.kaggle.com/datasets/madajaswanth/phone-dataset-8461-phones"
+    "https://www.kaggle.com/datasets/madajaswanth/phone-dataset-8461-phones",
+    "https://en.wikipedia.org/wiki/Samsung_Galaxy_Tab_S10"
   ],
   "variant": {
     "region": "global",

data/tablet/samsung/2024/galaxy-tab-s10-ultra/samsung-galaxy-tab-s10-ultra-16gb-512gb-5g.json

@@ -7,9 +7,10 @@
   "battery_mah": 11200,
   "weight_g": 718.0,
   "os": "Android 14, One UI 6.1",
-  "verified": false,
+  "verified": true,
   "source_urls": [
-    "https://www.kaggle.com/datasets/jakubkhalponiak/phones-2024"
+    "https://www.kaggle.com/datasets/jakubkhalponiak/phones-2024",
+    "https://en.wikipedia.org/wiki/Samsung_Galaxy_Tab_S10"
   ],
   "base_model_slug": "galaxy-tab-s10-ultra",
   "variant": {

data/tablet/samsung/2024/galaxy-z-fold6/samsung-galaxy-z-fold6-aitoolbuzz-9986-12gb-256gb-5g.json

@@ -8,9 +8,10 @@
   "battery_mah": 4400,
   "weight_g": 239.0,
   "os": "Android 14, up to 7 major upgrades",
-  "verified": false,
+  "verified": true,
   "source_urls": [
-    "https://aitoolbuzz.com/mobiles/samsung-galaxy-z-fold6"
+    "https://aitoolbuzz.com/mobiles/samsung-galaxy-z-fold6",
+    "https://en.wikipedia.org/wiki/Samsung_Galaxy_Z_Fold_6"
   ],
   "variant": {
     "region": "global",

data/tablet/samsung/2025/samsung-galaxy-tab-s11-ultra/samsung-galaxy-tab-s11-ultra.json

@@ -12,7 +12,7 @@
   "battery_mah": 11600,
   "weight_g": 692.0,
   "os": "Android 16",
-  "verified": false,
+  "verified": true,
   "source_urls": [
     "https://en.wikipedia.org/wiki/Samsung_Galaxy_Tab_S11"
   ]

data/tablet/samsung/2025/samsung-galaxy-tab-s11/samsung-galaxy-tab-s11.json

@@ -9,7 +9,7 @@
   "battery_mah": 8400,
   "weight_g": 469.0,
   "os": "Android 16",
-  "verified": false,
+  "verified": true,
   "source_urls": [
     "https://en.wikipedia.org/wiki/Samsung_Galaxy_Tab_S11"
   ]

data/watch/google/2025/google-pixel-watch-4-41mm/google-pixel-watch-4-41mm.json

@@ -12,7 +12,7 @@
   "storage_options_gb": [
     32
   ],
-  "verified": false,
+  "verified": true,
   "source_urls": [
     "https://en.wikipedia.org/wiki/Pixel_Watch_4"
   ]

data/watch/google/2025/google-pixel-watch-4-45mm/google-pixel-watch-4-45mm.json

@@ -12,7 +12,7 @@
   "storage_options_gb": [
     32
   ],
-  "verified": false,
+  "verified": true,
   "source_urls": [
     "https://en.wikipedia.org/wiki/Pixel_Watch_4"
   ]