feat(schemas): accept cadence field on subscription + contribution updates

tests/server/api/validation-phase3.test.js

@@ -160,6 +160,48 @@ describe('helcimSubscriptionSchema', () => {
     })
     expect(result.success).toBe(false)
   })
+
+  it('accepts cadence: monthly', () => {
+    const result = helcimSubscriptionSchema.safeParse({
+      customerId: '12345',
+      contributionTier: '15',
+      customerCode: 'CST123',
+      cadence: 'monthly'
+    })
+    expect(result.success).toBe(true)
+    expect(result.data.cadence).toBe('monthly')
+  })
+
+  it('accepts cadence: annual', () => {
+    const result = helcimSubscriptionSchema.safeParse({
+      customerId: '12345',
+      contributionTier: '15',
+      customerCode: 'CST123',
+      cadence: 'annual'
+    })
+    expect(result.success).toBe(true)
+    expect(result.data.cadence).toBe('annual')
+  })
+
+  it('rejects cadence: weekly', () => {
+    const result = helcimSubscriptionSchema.safeParse({
+      customerId: '12345',
+      contributionTier: '15',
+      customerCode: 'CST123',
+      cadence: 'weekly'
+    })
+    expect(result.success).toBe(false)
+  })
+
+  it('defaults cadence to monthly when omitted', () => {
+    const result = helcimSubscriptionSchema.safeParse({
+      customerId: '12345',
+      contributionTier: '15',
+      customerCode: 'CST123'
+    })
+    expect(result.success).toBe(true)
+    expect(result.data.cadence).toBe('monthly')
+  })
 })
 
 describe('helcimUpdateBillingSchema', () => {
@@ -310,6 +352,29 @@ describe('updateContributionSchema', () => {
     expect(result.success).toBe(true)
     expect(result.data).not.toHaveProperty('role')
   })
+
+  it('accepts cadence: monthly', () => {
+    const result = updateContributionSchema.safeParse({ contributionTier: '15', cadence: 'monthly' })
+    expect(result.success).toBe(true)
+    expect(result.data.cadence).toBe('monthly')
+  })
+
+  it('accepts cadence: annual', () => {
+    const result = updateContributionSchema.safeParse({ contributionTier: '15', cadence: 'annual' })
+    expect(result.success).toBe(true)
+    expect(result.data.cadence).toBe('annual')
+  })
+
+  it('rejects cadence: weekly', () => {
+    const result = updateContributionSchema.safeParse({ contributionTier: '15', cadence: 'weekly' })
+    expect(result.success).toBe(false)
+  })
+
+  it('defaults cadence to monthly when omitted', () => {
+    const result = updateContributionSchema.safeParse({ contributionTier: '15' })
+    expect(result.success).toBe(true)
+    expect(result.data.cadence).toBe('monthly')
+  })
 })
 
 // --- Series schemas ---