// Package store provides the database access layer for Pangolin.
// It wraps MySQL (via database/sql) and exposes:
//   - Open: the single canonical entry point for all MySQL connections,
//     which enforces UTC DSN parameters and asserts the session time_zone.
//   - MigrateUp / MigrateDown / MigrateVersion: golang-migrate helpers backed
//     by the embedded SQL files in server/migrations.
//
// Typed repository interfaces for each domain entity (users, devices, plans,
// subscriptions, codes, nodes, usage, audit log) are added as the feature
// tasks implement them.
package store