feat(courses): add GET /api/v1/admin/courses/:id/enrollment-trends endpoint (#391) - #459
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DeFiVC merged 2 commits intoSep 2, 2026
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…dpoint (ChainLearnOfficial#391) Admin endpoint returning enrollment trends for a course over time with configurable range (7d/30d/90d) and granularity (daily/weekly/monthly). Cached for 1 hour. Returns time series data with enrollment counts and total enrollments in the selected range. Follows the established controller→service→routes→types pattern with zod validation and authGuard+adminGuard middleware. Closes ChainLearnOfficial#391
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Summary
Adds — an admin endpoint that returns enrollment trends for a specific course over time.
Features
getCourseAnalytics's TTL)Implementation
controller → service → routes → typesmodule patterndate_trunc()for time bucketing (same approach asgetCourseAnalytics)rangeandgranularityenums)authGuard+adminGuardmiddleware (admin-only)NotFoundErrorfor non-existent courses (404)sql.raw()for safe interpolation of validated enum valuesCloses #391