Refactor tenant database configuration to use dynamic config values

- Replace hardcoded database names (online_arrahn, master_krk, kaunterpkb)
  with configurable values across the codebase
- Rename tennant_master.php to tennant_database.php for clearer naming
- Update config keys: 'database' → 'master_db', add 'kaunter_db'
- Update env variables: TENNANT_MASTER_DB and TENNANT_KAUNTER_DB
- Modify Helper.php to use dynamic database references in
  getOnlineArrahnConnection(), getActiveCawanganDbConnection(),
  and getInactiveCawanganDbConnection() methods
- Update database JOIN queries in CustomerController and MarhunController
  to use config values instead of hardcoded database names
- Simplify migration logic by removing redundant hardcoded database checks
- Update debug messages in CawanganDebugConnections to show actual
  configured database name
- Update bootstrap/app.php to load tennant_database config

This change improves multi-environment flexibility and eliminates
environment-specific hardcoded values, making the application more
configurable for different deployment scenarios (KRK, KGMK, etc).

database/migrations/2023_11_14_121109_add_columns_to_komuditi_transaksi.php

@@ -42,7 +42,7 @@ class AddColumnsToKomuditiTransaksi extends Migration
     {
         $online_arrahn_connection_array = array_filter(config('database.connections'), function($connection) {
 
-            if($connection['database'] === 'online_arrahn' || $connection['database'] === 'master_krk' || $connection['database'] === config('tennant_master.database')){
+            if($connection['database'] === config('tennant_database.master_db')){
                 return true;
             }
 
@@ -53,7 +53,7 @@ class AddColumnsToKomuditiTransaksi extends Migration
 
 
         if(empty($online_arrahn_connection_array)){
-            throw new Exception("online_arrahn or master_krk doesn't exist in config.database.connections array");
+            throw new Exception("Tennant master database (" . config('tennant_database.master_db') . ") doesn't exist in config.database.connections array");
         }
 
         return array_keys($online_arrahn_connection_array)[0];