fix: resolve architecture warnings (SVC-006, FE-008, FE-004)

- Move db.commit() from admin_subscription_service to API endpoints
- Add noqa comments for intentional number inputs in templates
- Add noqa comment for inline modal in subscriptions.html

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/services/admin_subscription_service.py

@@ -73,8 +73,6 @@ class AdminSubscriptionService:
 
         tier = SubscriptionTier(**tier_data)
         db.add(tier)
-        db.commit()
-        db.refresh(tier)
 
         logger.info(f"Created subscription tier: {tier.code}")
         return tier
@@ -88,9 +86,6 @@ class AdminSubscriptionService:
         for field, value in update_data.items():
             setattr(tier, field, value)
 
-        db.commit()
-        db.refresh(tier)
-
         logger.info(f"Updated subscription tier: {tier.code}")
         return tier
 
@@ -117,7 +112,6 @@ class AdminSubscriptionService:
             )
 
         tier.is_active = False
-        db.commit()
 
         logger.info(f"Soft-deleted subscription tier: {tier.code}")
 
@@ -192,9 +186,6 @@ class AdminSubscriptionService:
         for field, value in update_data.items():
             setattr(sub, field, value)
 
-        db.commit()
-        db.refresh(sub)
-
         logger.info(
             f"Admin updated subscription for vendor {vendor_id}: {list(update_data.keys())}"
         )