Increase MapPin horizontal padding from 8px to 12px

Names were too tight against the pill edges, especially on longer
provider names. Bumped token from spacing.2 to spacing.3.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tokens/component/mapPin.json

@@ -2,7 +2,7 @@
   "mapPin": {
     "$description": "MapPin atom tokens — price-pill map markers for provider/venue map views. Verified (brand) vs unverified (neutral) visual distinction.",
     "height": { "$type": "dimension", "$value": "28px", "$description": "Pill height — compact for map density" },
-    "paddingX": { "$type": "dimension", "$value": "{spacing.2}", "$description": "8px horizontal padding inside pill" },
+    "paddingX": { "$type": "dimension", "$value": "{spacing.3}", "$description": "12px horizontal padding inside pill" },
     "fontSize": { "$type": "dimension", "$value": "12px", "$description": "Small but legible price text" },
     "borderRadius": { "$type": "dimension", "$value": "{borderRadius.full}", "$description": "Fully rounded pill shape" },
     "dot": {