feat: add subscriber platform plugin POC with learner dashboard course categorization API.

openedx/plugins/subscriber/MANIFEST.in

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+include README.rst
+include openedx.yaml
+recursive-include subscriber *.py

openedx/plugins/subscriber/openedx.yaml

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+lms:
+  django_apps:
+    - subscriber
+  urls:
+    - subscriber.urls

openedx/plugins/subscriber/setup.py

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+from setuptools import setup, find_packages
+
+setup(
+    name="platform-plugin-subscriber",
+    version="0.1.0",
+    packages=find_packages(),
+    include_package_data=True,
+    package_data={
+        "": ["openedx.yaml"],
+    },
+    entry_points={
+        "lms.djangoapp": [
+            "subscriber = subscriber.apps:SubscriberConfig",
+        ],
+    },
+)

openedx/plugins/subscriber/subscriber/__init__.py

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+default_app_config = "subscriber.apps.SubscriberConfig"

openedx/plugins/subscriber/subscriber/apps.py

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+from django.apps import AppConfig
+
+
+class SubscriberConfig(AppConfig):
+    name = "subscriber"
+
+    plugin_app = {
+        "url_config": {
+            "lms.djangoapp": {
+                "namespace": "subscriber",
+                "regex": "^api/subscriber/",
+                "relative_path": "urls",
+            }
+        }
+    }

openedx/plugins/subscriber/subscriber/services.py

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+from common.djangoapps.student.models import CourseEnrollment
+
+# POC-only: hardcoded subscription catalog
+SUBSCRIPTION_COURSE_IDS = [
+    "course-v1:edX+DemoX+Demo_Course",
+]
+
+
+def get_categorized_courses(user):
+    """
+    Fetch user's enrolled courses and categorize them
+    for the Subscriber Learner Dashboard.
+    """
+
+    enrollments = CourseEnrollment.objects.filter(
+        user=user,
+        is_active=True
+    )
+
+    subscription_courses = []
+    upgradeable_courses = []
+    non_upgradeable_courses = []
+
+    # POC assumption: user is already a subscriber
+    user_is_subscriber = True
+
+    for enrollment in enrollments:
+        course_id = str(enrollment.course_id)
+
+        if course_id in SUBSCRIPTION_COURSE_IDS:
+            if user_is_subscriber:
+                subscription_courses.append(course_id)
+            else:
+                upgradeable_courses.append(course_id)
+        else:
+            non_upgradeable_courses.append(course_id)
+
+    return {
+        "subscription_courses": subscription_courses,
+        "upgradeable_courses": upgradeable_courses,
+        "non_upgradeable_courses": non_upgradeable_courses,
+    }

openedx/plugins/subscriber/subscriber/urls.py

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+from django.urls import path
+from .views import subscriber_courses
+
+urlpatterns = [
+    path(
+    "dashboard/courses/",
+    subscriber_courses,
+    name="subscriber-dashboard-courses",
+    ),
+]

openedx/plugins/subscriber/subscriber/views.py

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+from django.http import JsonResponse
+from django.contrib.auth.decorators import login_required
+from .services import get_categorized_courses
+
+
+@login_required
+def subscriber_courses(request):
+    """
+    API endpoint for Subscriber Learner Dashboard.
+    Returns user's enrolled courses grouped into categories.
+    """
+    data = get_categorized_courses(request.user)
+    return JsonResponse(data)