fix: resolve false PHPStan observer type mismatch

[chubes4]

Problem

Changed-file Homeboy lint reports a type mismatch at AbilityServiceProvider::register_full_runtime() even though WordPressActionDispatchObserver explicitly implements the required WP_Agent_Pending_Action_Observer interface.

inc/Core/Bootstrap/AbilityServiceProvider.php:125
Parameter #1 $observer of static method DataMachine\Engine\AI\Actions\PendingActionObservers::register() expects AgentsAPI\AI\Approvals\WP_Agent_Pending_Action_Observer, DataMachine\Engine\AI\Actions\WordPressActionDispatchObserver given.
[argument.type]

Evidence

• PendingActionObservers::register() accepts WP_Agent_Pending_Action_Observer.
• WordPressActionDispatchObserver implements WP_Agent_Pending_Action_Observer.
• The provider registration line dates to commit e66b6765e7; it was not introduced by the bootstrap simplification in refactor: remove ability manifest and obsolete class includes #3393.
• PHPCS passes before PHPStan emits this finding.

Expected

PHPStan resolves the shared Agents API interface consistently and accepts the concrete observer, or the repository's static-analysis bootstrap/config is corrected so it loads a single canonical interface definition.

Scope

Investigate Composer/static-analysis symbol resolution and fix the owning type/bootstrap configuration rather than suppressing the provider call.