fix(license): remove unlimited flag, device limit must always be a number

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

backend/app/config.py

@@ -136,7 +136,7 @@ class Settings(BaseSettings):
     CONFIG_RETENTION_DAYS: int = 90
 
     # Licensing — BSL 1.1 free tier allows up to 250 devices.
-    # Commercial license required above this limit. Set to 0 for unlimited.
+    # Commercial license required above this limit.
     LICENSE_DEVICES: int = 250
 
     # App settings

backend/app/routers/settings.py

@@ -194,6 +194,6 @@ async def get_license_status():
     return {
         "licensed_devices": limit,
         "actual_devices": device_count,
-        "over_limit": limit > 0 and device_count > limit,
+        "over_limit": device_count > limit,
         "tier": "commercial" if limit > 250 else "free",
     }