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/schedule/schedule.go

@@ -4,11 +4,8 @@ package schedule
 
 import (
 	"bd2server/internal/server/versionconfig"
-	"encoding/json"
 	"errors"
-	"fmt"
 	"math"
-	"os"
 
 	"bd2server/internal/server/wire"
 )
@@ -44,23 +41,6 @@ type Service struct {
 	Regular               []RegularSeason `json:"regular"`
 }
 
-// Load reads this server's versioned calendar policy. It does not infer live
-// official seasons from today's clock or from static reward design tables.
-func Load(path string) (*Service, error) {
-	raw, err := os.ReadFile(path)
-	if err != nil {
-		return nil, fmt.Errorf("schedule: read seed: %w", err)
-	}
-	var s Service
-	if err := json.Unmarshal(raw, &s); err != nil {
-		return nil, fmt.Errorf("schedule: decode seed: %w", err)
-	}
-	if err := s.Validate(); err != nil {
-		return nil, err
-	}
-	return &s, nil
-}
-
 func (s *Service) Validate() error {
 	if s == nil || s.Version != versionconfig.State() || s.CalculateMilliseconds == 0 || s.CalculateMilliseconds > math.MaxInt32 || len(s.Contents) == 0 {
 		return errors.New("schedule: invalid calendar version/calculation interval")