feat: refresh token

crates/adapters/sqlite/migrations/20260829000000_create_refresh_sessions.sql

@@ -0,0 +1,10 @@
+CREATE TABLE IF NOT EXISTS refresh_sessions (
+    id TEXT PRIMARY KEY NOT NULL,
+    user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    token TEXT NOT NULL UNIQUE,
+    expires_at TEXT NOT NULL,
+    created_at TEXT NOT NULL
+);
+
+CREATE INDEX IF NOT EXISTS idx_refresh_sessions_token ON refresh_sessions(token);
+CREATE INDEX IF NOT EXISTS idx_refresh_sessions_user_id ON refresh_sessions(user_id);