feat: use LearnerLicenseSerializer for auto-apply API

[adamstankiewicz]

Description

https://2u-internal.atlassian.net/browse/ENT-8563

Makes use of the LearnerLicenseSerializer on the auto-apply API endpoint for consistent data representations between the list of licenses returned by learner-licenses and when a license is auto-applied (e.g., for integrated customers).

The primary difference is that the associated subscription_plan is now returned alongside the license.

{
    "uuid": "00dd289d-694e-49ec-9c63-160938ce6090",
    "status": "activated",
    "userEmail": "[email protected]",
    "activationDate": "2023-10-18T17:40:08.461063Z",
    "lastRemindDate": "2023-10-18T17:40:08.461063Z",
    "subscriptionPlanUuid": "0aa4a80b-5772-4734-b73f-4d26de3326e5",
    "revokedDate": null,
    "activationKey": "503f6607-c2eb-4333-940f-96707669106a",
    "customerAgreement": {
        "uuid": "d5733156-5f3d-439d-bcd5-89cfc3ad2bde",
        "enterpriseCustomerUuid": "02982884-1f1f-4103-b6d7-3a602c1afcbd",
        "enterpriseCustomerSlug": "adam-autoapplied-enterprise",
        "defaultEnterpriseCatalogUuid": null,
        "disableExpirationNotifications": false,
        "netDaysUntilExpiration": 228,
        "subscriptionForAutoAppliedLicenses": "0aa4a80b-5772-4734-b73f-4d26de3326e5"
    },
    "subscriptionPlan": {
        "title": "Test Auto-Applied Subscription",
        "uuid": "0aa4a80b-5772-4734-b73f-4d26de3326e5",
        "startDate": "2023-10-18T16:30:57Z",
        "expirationDate": "2024-10-18T16:30:58Z",
        "enterpriseCustomerUuid": "02982884-1f1f-4103-b6d7-3a602c1afcbd",
        "enterpriseCatalogUuid": "0005bb70-a1c6-4d8e-a801-9a9fa287a13b",
        "isActive": true,
        "isRevocationCapEnabled": false,
        "daysUntilExpiration": 228,
        "daysUntilExpirationIncludingRenewals": 228,
        "isLockedForRenewalProcessing": false,
        "shouldAutoApplyLicenses": true
    }
}

[iloveagent57]

small suggestion: in _auto_apply_new_license(), could you try changing the license fetch to be

auto_applied_license = subscription_plan.unassigned_licenses.select_related(
    'subscription_plan',
    'subscription_plan__customer_agreement',
).first()

so that LearnerLicenseSerializer doesn't make two more reads to fetch the plan and agreement?

[adamstankiewicz]

small suggestion: in _auto_apply_new_license(), could you try changing the license fetch to be

auto_applied_license = subscription_plan.unassigned_licenses.select_related(
    'subscription_plan',
    'subscription_plan__customer_agreement',
).first()

so that LearnerLicenseSerializer doesn't make two more reads to fetch the plan and agreement?

Good call! Updated.