feat: port logic from Java original to align with current Java behavior

- Switch Telegram parse mode to HTML to match Java client.
- Rename command identifiers to Java's: delgroup/delapple/delgoogle/
  checkappscore/rawappleapp/rawgoogleapp.
- Move admin singleton to "common" collection at _id="admin".
- Store group _id as string-of-int64 to match Java AbstractModel schema.
- Add `class` discriminator field on persisted models.
- Expand AppleAppResponse (42 fields) and GoogleAppResponse (63 fields,
  with nested Category/Feature) to match Java records.
- Add AppleAppRequest (track id or bundle id) / GoogleAppRequest types.
- Implement Raw* commands as Telegram document attachments instead of
  truncated text.
- Group-authorization gate (admin.HasGroup(chatId)) on non-admin commands.
- Cache TTL via millis timestamp; round score to 1 decimal; weekend silent
  send in scheduler.
- Match Java table renderer: " │ " separators, "─┼─" rows every 5 lines.
- Prefer MONGODB_CONNECTION_STRING env (Java parity); auto-extract DB
  name from URI with fallback to "store-scraper-bot".

Note: This is an AI-assisted port (not human-verified). Behavior parity
with the Java implementation has not been tested end-to-end; treat as a
starting point.

internal/bot/command/delete_google_app.go

@@ -1,52 +1,39 @@
 package command
 
 import (
-	"fmt"
-	"strings"
-
 	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api/v5"
 	"github.com/miti99/store-scraper-bot-go/internal/config"
 	"github.com/miti99/store-scraper-bot-go/internal/repository"
 )
 
+// /delgoogle <appId> — Java DeleteGoogleAppCommand.
 type DeleteGoogleAppCommand struct {
-	BaseCommand
+	cfg       *config.Config
 	adminRepo *repository.AdminRepository
 	groupRepo *repository.GroupRepository
 }
 
 func NewDeleteGoogleAppCommand(cfg *config.Config, adminRepo *repository.AdminRepository, groupRepo *repository.GroupRepository) *DeleteGoogleAppCommand {
-	return &DeleteGoogleAppCommand{
-		BaseCommand: BaseCommand{cfg: cfg},
-		adminRepo:   adminRepo,
-		groupRepo:   groupRepo,
-	}
+	return &DeleteGoogleAppCommand{cfg: cfg, adminRepo: adminRepo, groupRepo: groupRepo}
 }
 
-func (c *DeleteGoogleAppCommand) Execute(message *tgbotapi.Message) string {
-	if !c.requireAdmin(message) {
-		return "You are not authorized to use this command."
+func (c *DeleteGoogleAppCommand) Execute(msg *tgbotapi.Message, sender Sender) {
+	if !authorizeGroup(msg.Chat.ID, c.adminRepo, sender) {
+		return
 	}
-
-	groupID := message.Chat.ID
-	hasGroup, err := c.adminRepo.HasGroup(groupID)
+	args := splitArgs(msg.CommandArguments())
+	if len(args) != 1 {
+		_ = sender.SendMessage(msg.Chat.ID, "Invalid arguments")
+		return
+	}
+	removed, err := c.groupRepo.RemoveGoogleApp(msg.Chat.ID, args[0])
 	if err != nil {
-		return fmt.Sprintf("Failed to check group: %v", err)
+		_ = sender.SendMessage(msg.Chat.ID, "Internal server error")
+		return
 	}
-	if !hasGroup {
-		return "This group is not registered."
+	if !removed {
+		_ = sender.SendMessage(msg.Chat.ID, "Google app is not added")
+		return
 	}
-
-	args := strings.Fields(message.CommandArguments())
-	if len(args) == 0 {
-		return "Usage: /deletegoogle <appId>\nExample: /deletegoogle com.example.app"
-	}
-
-	appID := args[0]
-
-	if err := c.groupRepo.RemoveGoogleApp(groupID, appID); err != nil {
-		return fmt.Sprintf("Failed to remove app: %v", err)
-	}
-
-	return fmt.Sprintf("Google app %s has been removed successfully.", appID)
+	_ = sender.SendMessage(msg.Chat.ID, "Google app deleted successfully")
 }