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/eventplay/progress.go

@@ -0,0 +1,35 @@
+package eventplay
+
+import "bd2server/internal/server/events"
+
+func (s *Service) AttachProgress(fn func(condition, sub, count uint64) error) { s.onProgress = fn }
+func (s *Service) AssociatedMissionGroup(c events.Schedule) (uint64, error) {
+	if c.Type != 11 {
+		return 0, nil
+	}
+	game, e := s.design.Row("PackEventMiniGameTable", 8, c.ID)
+	if e != nil {
+		return 0, e
+	}
+	switch num(game, 3) {
+	case 5:
+		row, e := s.design.Row("FieldMiniGameSurvivalTable", 9, num(game, 4))
+		if e != nil {
+			return 0, e
+		}
+		return num(row, 8), nil
+	case 7:
+		if len(s.design.Tables["MGDDefaultTable"]) > 0 {
+			return num(s.design.Tables["MGDDefaultTable"][0], 5), nil
+		}
+	case 8:
+		if len(s.design.Tables["ActionGameDefaultTable"]) > 0 {
+			return num(s.design.Tables["ActionGameDefaultTable"][0], 8), nil
+		}
+	case 12:
+		if len(s.design.Tables["HopscotchDefaultTable"]) > 0 {
+			return num(s.design.Tables["HopscotchDefaultTable"][0], 20), nil
+		}
+	}
+	return 0, nil
+}