Добавил запрос на создание препода от кафедры

backend/src/main/resources/db/migration/V1__init.sql

@@ -133,6 +133,10 @@ CREATE UNIQUE INDEX IF NOT EXISTS uq_teacher_department_open_primary
     ON teacher_department_assignments(teacher_id)
     WHERE is_primary = TRUE AND valid_to IS NULL;
 
+CREATE UNIQUE INDEX IF NOT EXISTS uq_teacher_department_open_pair
+    ON teacher_department_assignments(teacher_id, department_id)
+    WHERE valid_to IS NULL;
+
 INSERT INTO teacher_department_assignments (teacher_id, department_id, valid_from, is_primary, comment)
 SELECT u.id, u.department_id, COALESCE(u.created_at::DATE, CURRENT_DATE), TRUE, 'Начальная кафедра из users.department_id'
 FROM users u
@@ -143,6 +147,34 @@ WHERE u.role = 'TEACHER'
       WHERE existing.teacher_id = u.id
   );
 
+CREATE TABLE IF NOT EXISTS teacher_creation_requests (
+    id BIGSERIAL PRIMARY KEY,
+    department_id BIGINT NOT NULL REFERENCES departments(id),
+    username VARCHAR(50) NOT NULL,
+    full_name VARCHAR(255) NOT NULL,
+    job_title VARCHAR(255) NOT NULL,
+    comment TEXT,
+    status VARCHAR(20) NOT NULL DEFAULT 'PENDING',
+    requested_by BIGINT REFERENCES users(id),
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    reviewed_by BIGINT REFERENCES users(id),
+    reviewed_at TIMESTAMP,
+    review_comment TEXT,
+    created_teacher_id BIGINT REFERENCES users(id),
+    CONSTRAINT chk_teacher_creation_request_status CHECK (status IN ('PENDING', 'APPROVED', 'REJECTED'))
+);
+
+CREATE INDEX IF NOT EXISTS idx_teacher_creation_requests_department
+    ON teacher_creation_requests(department_id, created_at DESC);
+
+CREATE INDEX IF NOT EXISTS idx_teacher_creation_requests_status
+    ON teacher_creation_requests(status, created_at DESC);
+
+CREATE UNIQUE INDEX IF NOT EXISTS uq_teacher_creation_requests_pending_username
+    ON teacher_creation_requests(username)
+    WHERE status = 'PENDING';
+
 -- ==========================================
 -- Образовательные формы
 -- ==========================================
@@ -938,6 +970,7 @@ COMMENT ON TABLE schedule_rule_groups IS 'Привязка правил расп
 COMMENT ON TABLE schedule_rule_slots IS 'Слоты проведения занятий внутри правила расписания';
 COMMENT ON TABLE schedule_rule_slot_subgroups IS 'Подгруппы лабораторных слотов правила расписания';
 COMMENT ON TABLE teacher_department_assignments IS 'История принадлежности преподавателей к кафедрам';
+COMMENT ON TABLE teacher_creation_requests IS 'Заявки кафедр на создание преподавателей';
 COMMENT ON TABLE subject_comments IS 'Комментарии кафедр и администраторов к дисциплинам';
 COMMENT ON TABLE schedule_overrides IS 'Точечные изменения конкретных сгенерированных пар';
 COMMENT ON COLUMN schedule_rules.lecture_academic_hours IS 'Лимит академических часов лекций';