feat(all): add hunting and events, commerce and rewards, binary calendars, GameData caching and login diagnostics

Implement hunting AP and progress, event tasks, exchanges, games, stories and actions; connect battle and reward handling.

Add CashShop plugin and installation, server purchases and entitlements, recharge rules and plugin version metadata.

Distribute binary calendars independently; cache GameData in memory and fix single-connection query deadlocks.

Improve automatic login and recovery diagnostics; document configuration and release flows.

go/internal/server/versionconfig/config.go

@@ -41,6 +41,7 @@ type PluginVersions struct {
 	LocalIdentity      string `json:"local_identity"`
 	CaptureEnvironment string `json:"capture_environment"`
 	LoginUI            string `json:"login_ui"`
+	CashShop           string `json:"cash_shop"`
 }
 
 // Load reads one explicit version file. Unknown fields and trailing JSON are