Root cause: The SQL query in AdviceProcessAppMapper.xml used a plain LEFT JOIN with
med_medication_dispense on med_req_id. When a single medication request had multiple
dispense records (e.g., from repeated executions or summary operations), the JOIN
produced multiple rows per request — up to 222 rows for one request. SELECT DISTINCT
could not deduplicate because dispense_status values differed across rows.
Fix: Replace the plain LEFT JOIN with LEFT JOIN LATERAL (subquery ORDER BY create_time
DESC LIMIT 1) to fetch only the most recent dispense record per medication request.
This ensures exactly one row per request regardless of how many dispense records exist.
Verified: SQL query now returns 0 duplicate rows across all medication requests.
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