Seed default LMS personas in migration 063.

Insert ids 1-3 catalog rows and sync sequence on up; delete seed ids on down before dropping lms_personas.

Co-authored-by: Cursor <cursoragent@cursor.com>

db/migrations/000063_lms_personas.down.sql

@@ -14,4 +14,8 @@ SET persona_id = NULL;
 ALTER TABLE lms_practices
     ADD CONSTRAINT lms_practices_persona_id_fkey FOREIGN KEY (persona_id) REFERENCES users (id) ON DELETE SET NULL;
 
+-- Remove seeded default personas before dropping the catalog table.
+DELETE FROM lms_personas
+WHERE id IN (1, 2, 3);
+
 DROP TABLE IF EXISTS lms_personas;

db/migrations/000063_lms_personas.up.sql

@@ -14,6 +14,36 @@ WHERE is_active;
 
 CREATE INDEX idx_lms_personas_created_at ON lms_personas (created_at DESC);
 
+-- Default catalog personas (stable ids for envs and Postman); add more via API.
+INSERT INTO lms_personas (id, name, description, avatar_url, is_active)
+VALUES
+    (
+        1,
+        'Friendly Coach',
+        'Warm, encouraging tutor for everyday conversational practice.',
+        NULL,
+        TRUE
+    ),
+    (
+        2,
+        'Exam Coach',
+        'Structured, exam-style guidance and clear checkpoints.',
+        NULL,
+        TRUE
+    ),
+    (
+        3,
+        'Story Narrator',
+        'Story-led scenarios with character-driven prompts.',
+        NULL,
+        TRUE
+    );
+
+SELECT setval(
+    pg_get_serial_sequence('lms_personas', 'id'),
+    (SELECT COALESCE(MAX(id), 1) FROM lms_personas)
+);
+
 -- persona_id historically referenced users.id; personas are now catalog rows on lms_personas.
 ALTER TABLE lms_practices DROP CONSTRAINT IF EXISTS lms_practices_persona_id_fkey;