fix: full schema reset on startup (DROP SCHEMA CASCADE)

backend/start.sh

@@ -4,18 +4,22 @@ set -e
 echo "Waiting for database..."
 sleep 3
 
-echo "Resetting database schema..."
+echo "Resetting database (full schema drop)..."
 python -c "
 from app.database import engine
 from app.models import Base
-import sqlalchemy as sa
+from sqlalchemy import text
+
+with engine.connect() as conn:
+    conn.execute(text('DROP SCHEMA public CASCADE'))
+    conn.execute(text('CREATE SCHEMA public'))
+    conn.execute(text('GRANT ALL ON SCHEMA public TO servesync'))
+    conn.execute(text('GRANT ALL ON SCHEMA public TO public'))
+    conn.commit()
+print('Schema dropped.')
 
-# Drop all tables for clean v2 schema
-print('Dropping old tables...')
-Base.metadata.drop_all(bind=engine)
-print('Creating new tables...')
 Base.metadata.create_all(bind=engine)
-print('Schema ready.')
+print('New schema created.')
 "
 
 echo "Seeding data..."