[Fix] Resolve PHP8.5 deprecation warnings

[RichardAnderson]

This pull request removes unnecessary calls to setAccessible(true) when using PHP's Reflection API in various test files. This method has been removed in 8.5 and has been deprecated since 8.1, so throws warnings when we run unit tests against 8.5.

[Copilot]

Pull request overview

This PR updates the test suite to be compatible with PHP 8.5 by removing deprecated/removed ReflectionMethod::setAccessible(true) / ReflectionProperty::setAccessible(true) calls, avoiding deprecation warnings (and future failures) when running tests on newer PHP versions.

Changes:

• Removed setAccessible(true) calls from Reflection usage in multiple tests.
• Cleaned up a now-redundant comment in the workflow input resolution test.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
tests/Unit/Plugins/LegacyPluginsTest.php	Removes setAccessible(true) before invoking reflected methods to avoid PHP 8.5 deprecations.
tests/Unit/Models/ServerModelTest.php	Removes setAccessible(true) on a reflected property before setting its value in a test.
tests/Feature/WorkflowInputResolutionTest.php	Removes setAccessible(true) calls when invoking a reflected private method (and drops a redundant comment).

Comments suppressed due to low confidence (1)

tests/Feature/WorkflowInputResolutionTest.php:226

• The inline comments in this test are misleading: resolveInputs() intentionally returns array_merge($previousOutputs, $resolvedInputs), so explicit action inputs (like server_id => 999) take priority in the merged result, while string interpolation uses the original $previousOutputs. Consider updating the comments to reflect that nuance to avoid confusion when maintaining these tests.

        $previousOutputs = [
            'server_id' => 123, // This should take priority
            'server_ip' => '192.168.1.100',
        ];

        $actionInputs = [
            'server_id' => 999, // This should be overridden
            'command' => 'echo "Using server {server_id}"',