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/Clickhouse/General.php

@@ -76,8 +76,8 @@ class General extends Component
         return [
             'name' => ValidationPatterns::nameRules(),
             'description' => ValidationPatterns::descriptionRules(),
-            'clickhouseAdminUser' => 'required|string',
-            'clickhouseAdminPassword' => 'required|string',
+            'clickhouseAdminUser' => ValidationPatterns::databaseIdentifierRules(),
+            'clickhouseAdminPassword' => ValidationPatterns::databasePasswordRules(),
             'image' => 'required|string',
             'portsMappings' => ValidationPatterns::portMappingRules(),
             'isPublic' => 'nullable|boolean',
@@ -96,10 +96,8 @@ class General extends Component
             ValidationPatterns::combinedMessages(),
             ValidationPatterns::portMappingMessages(),
             [
-                'clickhouseAdminUser.required' => 'The Admin User field is required.',
-                'clickhouseAdminUser.string' => 'The Admin User must be a string.',
-                'clickhouseAdminPassword.required' => 'The Admin Password field is required.',
-                'clickhouseAdminPassword.string' => 'The Admin Password must be a string.',
+                ...ValidationPatterns::databaseIdentifierMessages('clickhouseAdminUser', 'Admin User'),
+                ...ValidationPatterns::databasePasswordMessages('clickhouseAdminPassword', 'Admin Password'),
                 'image.required' => 'The Docker Image field is required.',
                 'image.string' => 'The Docker Image must be a string.',
                 'publicPort.integer' => 'The Public Port must be an integer.',