fix(database): enforce credential format validation and sanitize init/SSL arguments

Add ValidationPatterns helpers for database identifiers and passwords,
apply them across database Livewire components and the API controller,
encode MongoDB init script values via json_encode, and pass the MySQL
user through escapeshellarg when generating SSL chown commands.

app/Livewire/Project/Database/Redis/General.php

@@ -81,8 +81,8 @@ class General extends Component
             'publicPortTimeout' => 'nullable|integer|min:1',
             'isLogDrainEnabled' => 'nullable|boolean',
             'customDockerRunOptions' => 'nullable',
-            'redisUsername' => 'required',
-            'redisPassword' => 'required',
+            'redisUsername' => ValidationPatterns::databaseIdentifierRules(),
+            'redisPassword' => ValidationPatterns::databasePasswordRules(),
             'enableSsl' => 'boolean',
         ];
     }
@@ -100,8 +100,8 @@ class General extends Component
                 'publicPort.max' => 'The Public Port must not exceed 65535.',
                 'publicPortTimeout.integer' => 'The Public Port Timeout must be an integer.',
                 'publicPortTimeout.min' => 'The Public Port Timeout must be at least 1.',
-                'redisUsername.required' => 'The Redis Username field is required.',
-                'redisPassword.required' => 'The Redis Password field is required.',
+                ...ValidationPatterns::databaseIdentifierMessages('redisUsername', 'Redis Username'),
+                ...ValidationPatterns::databasePasswordMessages('redisPassword', 'Redis Password'),
             ]
         );
     }