fix: pass API URL params to ProvisioningService in all handlers

- Add env.LINODE_API_URL and env.VULTR_API_URL to all ProvisioningService
  constructor calls in provision.ts
- Fixes delete and other operations using wrong API endpoint (defaulting
  to api.linode.com instead of configured emulator URL)
- Affected handlers: handleGetOrders, handleGetOrder, handleDeleteOrder,
  handleGetBalance, handleGetOsImages

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

src/handlers/provision.ts

@@ -190,7 +190,9 @@ export async function handleGetOrders(
       env.DB,
       env.USER_DB,
       env.LINODE_API_KEY,
-      env.VULTR_API_KEY
+      env.VULTR_API_KEY,
+      env.LINODE_API_URL,
+      env.VULTR_API_URL
     );
 
     const orders = await provisioningService.getUserOrders(userId);
@@ -231,7 +233,9 @@ export async function handleGetOrder(
       env.DB,
       env.USER_DB,
       env.LINODE_API_KEY,
-      env.VULTR_API_KEY
+      env.VULTR_API_KEY,
+      env.LINODE_API_URL,
+      env.VULTR_API_URL
     );
 
     const order = await provisioningService.getOrder(orderId);
@@ -277,7 +281,9 @@ export async function handleDeleteOrder(
       env.DB,
       env.USER_DB,
       env.LINODE_API_KEY,
-      env.VULTR_API_KEY
+      env.VULTR_API_KEY,
+      env.LINODE_API_URL,
+      env.VULTR_API_URL
     );
 
     // Verify user exists first (same pattern as handleGetOrder)
@@ -333,7 +339,9 @@ export async function handleGetBalance(
       env.DB,
       env.USER_DB,
       env.LINODE_API_KEY,
-      env.VULTR_API_KEY
+      env.VULTR_API_KEY,
+      env.LINODE_API_URL,
+      env.VULTR_API_URL
     );
 
     const balance = await provisioningService.getUserBalance(userId);
@@ -368,7 +376,11 @@ export async function handleGetOsImages(
     const provisioningService = new ProvisioningService(
       env,
       env.DB,
-      env.USER_DB
+      env.USER_DB,
+      env.LINODE_API_KEY,
+      env.VULTR_API_KEY,
+      env.LINODE_API_URL,
+      env.VULTR_API_URL
     );
 
     const images = await provisioningService.getOsImages();