fix(enrichment): only bill Enrow verify on a completed verification

getCost returned a flat 0.25 credits regardless of output, so a job that
fell back to the initial submit response (poll never completed, no
qualification) was still metered. Charge 0.25 only when a qualification is
present; 0 otherwise. Add a no-qualification test case.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: TheodoreSpeaks

apps/sim/tools/enrow-hosting.test.ts

@@ -52,14 +52,19 @@ describe('Enrow find_email pricing', () => {
 })
 
 describe('Enrow verify_email pricing', () => {
-  it('charges 0.25 credits per verification regardless of result', () => {
+  it('charges 0.25 credits for a completed verification (valid or invalid)', () => {
     expect(cost(enrowVerifyEmailTool, {}, { qualification: 'valid' }).cost).toBeCloseTo(
       0.25 * ENROW_CREDIT_USD
     )
     expect(cost(enrowVerifyEmailTool, {}, { qualification: 'invalid' }).cost).toBeCloseTo(
       0.25 * ENROW_CREDIT_USD
     )
   })
+
+  it('charges 0 credits when the job did not complete (no qualification)', () => {
+    expect(cost(enrowVerifyEmailTool, {}, { qualification: null }).cost).toBe(0)
+    expect(cost(enrowVerifyEmailTool, {}, {}).cost).toBe(0)
+  })
 })
 
 describe('Enrow find_email postProcess polling', () => {

apps/sim/tools/enrow/verify_email.ts

@@ -42,9 +42,11 @@ export const enrowVerifyEmailTool: ToolConfig<EnrowVerifyEmailParams, EnrowVerif
     'Verify the deliverability of an email address using the Enrow async verifier. Submits a verification request and polls until the result is ready. Costs 0.25 credits per verification. (https://enrow.readme.io/reference/verify-single-email)',
   version: '1.0.0',
 
-  hosting: enrowHosting<EnrowVerifyEmailParams>((_params, _output) => {
-    // 0.25 credits charged per verification call regardless of result
-    return 0.25
+  hosting: enrowHosting<EnrowVerifyEmailParams>((_params, output) => {
+    // 0.25 credits per completed verification. Bill only when the job resolved
+    // to a qualification — a fall-back to the initial submit response (poll never
+    // finished) has no qualification and must not be charged.
+    return output.qualification ? 0.25 : 0
   }),
 
   params: {