feat: enhance agent management and validation logic

- Updated AGENTS.md to clarify agent account restrictions and permissions.
- Implemented checks in AgentNodeAdminUserStoreController and AgentNodeRoleStoreController to restrict admin user and role creation to the agent's own node.
- Enhanced validation in AdminPlayerStoreController and AdminPlayerUpdateController to enforce credit limit and rebate rate rules based on player funding mode.
- Refactored various request classes to utilize shared admin account field rules for consistency.
- Improved error handling in services related to credit allocation and rebate limits to ensure proper validation and messaging.

app/Http/Requests/Admin/Concerns/AgentProfileFieldRules.php

@@ -10,7 +10,7 @@ trait AgentProfileFieldRules
         return [
             'total_share_rate' => ['sometimes', 'numeric', 'min:0', 'max:100'],
             'relative_share_rate' => ['sometimes', 'numeric', 'min:0', 'max:100'],
-            'credit_limit' => ['sometimes', 'integer', 'min:0'],
+            'credit_limit' => ['sometimes', 'integer', 'min:0', 'max:999999999'],
             'rebate_limit' => ['sometimes', 'numeric', 'min:0', 'max:100'],
             'default_player_rebate' => ['sometimes', 'numeric', 'min:0', 'max:100'],
             'can_grant_extra_rebate' => ['sometimes', 'boolean'],