feat(db): миграции групп, курсов, статусов и профиля

deploy/preflight/groups-courses.sql

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+-- Preflight (до миграций) для перехода на группы-когорты, курсы и перенос лаб/материалов.
+-- Только чтение. Запускать на копии рабочей БД до применения миграций.
+-- Пример:
+--   psql -h localhost -U lms -d lms -f deploy/preflight/groups-courses.sql
+
+\pset pager off
+\echo '=== 1. Группы, не подходящие под шаблон ^(.+)-([0-9])([0-9]+)(БО|МО)$ ==='
+SELECT id, name
+FROM identity.groups
+WHERE name !~ '^(.+)-([0-9])([0-9]+)(БО|МО)$'
+ORDER BY name;
+
+\echo '=== 2. Разобранные группы с одинаковым кортежем (stream, degree, number, course, enrollment_year) ==='
+WITH params AS (
+    SELECT CASE
+        WHEN EXTRACT(MONTH FROM now()) >= 9 THEN EXTRACT(YEAR FROM now())
+        ELSE EXTRACT(YEAR FROM now()) - 1
+    END::int AS academic_year_start
+),
+parsed AS (
+    SELECT
+        g.name,
+        m[1] AS stream,
+        m[2]::int AS course,
+        m[3]::int AS number,
+        m[4] AS degree,
+        (SELECT academic_year_start FROM params) - (m[2]::int - 1) AS enrollment_year
+    FROM identity.groups g
+    CROSS JOIN LATERAL (
+        SELECT regexp_match(g.name, '^(.+)-([0-9])([0-9]+)(БО|МО)$') AS m
+    ) parsed_name
+    WHERE m IS NOT NULL
+)
+SELECT stream, degree, number, course, enrollment_year,
+       count(*) AS groups,
+       array_agg(name ORDER BY name) AS names
+FROM parsed
+GROUP BY stream, degree, number, course, enrollment_year
+HAVING count(*) > 1
+ORDER BY stream, degree, course, number;
+
+\echo '=== 3. Группы, которые не разберутся шаблоном (потребуют ручного разбора) ==='
+WITH parsed AS (
+    SELECT
+        g.id,
+        g.name,
+        m[1] AS stream,
+        m[2]::int AS course,
+        m[3]::int AS number,
+        m[4] AS degree
+    FROM identity.groups g
+    CROSS JOIN LATERAL (
+        SELECT regexp_match(g.name, '^(.+)-([0-9])([0-9]+)(БО|МО)$') AS m
+    ) parsed_name
+)
+SELECT id, name, stream, course, number, degree
+FROM parsed
+WHERE stream IS NULL
+   OR course IS NULL
+   OR number IS NULL
+   OR degree IS NULL
+ORDER BY name;
+
+\echo '=== 4. Одинаковые имена групп (после снятия UNIQUE станут допустимы) ==='
+SELECT name, count(*) AS groups
+FROM identity.groups
+GROUP BY name
+HAVING count(*) > 1
+ORDER BY name;
+
+\echo '=== 5. Студенты без текущей группы ==='
+SELECT s.student_no, a.login, s.last_name, s.first_name
+FROM identity.students s
+JOIN identity.accounts a ON a.id = s.account_id
+LEFT JOIN identity.enrollments e ON e.student_id = s.account_id
+WHERE e.id IS NULL
+ORDER BY s.student_no;
+
+\echo '=== 6. Аккаунты по ролям (до появления статусов) ==='
+SELECT role, count(*) AS accounts
+FROM identity.accounts
+GROUP BY role
+ORDER BY role;
+
+\echo '=== 7. Дубли номеров лабораторных (все лабы переезжают в один курс C) ==='
+SELECT number,
+       count(*) AS labs,
+       array_agg(id ORDER BY created_at) AS ids,
+       array_agg(title ORDER BY created_at) AS titles
+FROM academic.labs
+GROUP BY number
+HAVING count(*) > 1
+ORDER BY number;
+
+\echo '=== 8. Лабораторные по семестрам ==='
+SELECT semester_id, number, count(*) AS labs
+FROM academic.labs
+GROUP BY semester_id, number
+HAVING count(*) > 1
+ORDER BY semester_id, number;
+
+\echo '=== 9. Дубли slug глав (до перехода на частичные индексы) ==='
+SELECT slug, count(*) AS chapters
+FROM academic.chapters
+GROUP BY slug
+HAVING count(*) > 1
+ORDER BY slug;
+
+\echo '=== 10. Объём материалов ==='
+SELECT
+    (SELECT count(*) FROM academic.chapters) AS chapters,
+    (SELECT count(*) FROM academic.sections) AS sections,
+    (SELECT count(*) FROM academic.articles) AS articles,
+    (SELECT count(*) FROM academic.article_assets) AS article_assets;
+
+\echo '=== 11. Активы без статьи ==='
+SELECT count(*) AS assets_without_article
+FROM academic.article_assets
+WHERE article_id IS NULL;
+
+\echo '=== 12. Семестры ==='
+SELECT id, title, year, active
+FROM academic.semesters
+ORDER BY year, title;