fix: resolve critical authentication failures in production

Fixes multiple authentication system conflicts causing redirect loops
that prevented all trainer and master trainer pages from loading.

Root cause: Three authentication systems competing on template_redirect:
- HVAC_Route_Manager (priority 1)
- HVAC_Plugin (priority 5)
- HVAC_Access_Control (priority 10)

Solution: Temporarily disable conflicting systems, keep HVAC_Access_Control
as primary authentication handler.

Verified working:
- /trainer/dashboard/, /trainer/venue/list/, /trainer/venue/manage/
- /master-trainer/dashboard/, /master-trainer/announcements/, /master-trainer/trainers/

Phase 1 Native Event System now fully operational in production.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

includes/class-hvac-plugin.php

@@ -524,8 +524,8 @@ final class HVAC_Plugin {
         // Initialize secondary components
         $this->initializeComponents();
         
-        // Registration access hook
-        add_action('template_redirect', [$this, 'ensure_registration_access'], 5);
+        // Registration access hook - TEMPORARILY DISABLED due to conflict with HVAC_Access_Control
+        // add_action('template_redirect', [$this, 'ensure_registration_access'], 5);
         
         $this->isInitialized = true;
     }

includes/class-hvac-route-manager.php

@@ -105,8 +105,8 @@ class HVAC_Route_Manager {
         // Register rewrite rules
         add_action('init', array($this, 'register_rewrite_rules'), 5);
         
-        // Handle redirects - run very early
-        add_action('template_redirect', array($this, 'handle_redirects'), 1);
+        // Handle redirects - TEMPORARILY DISABLED due to conflict with HVAC_Access_Control
+        // add_action('template_redirect', array($this, 'handle_redirects'), 1);
         
         // Intercept page queries for legacy URLs
         add_action('pre_get_posts', array($this, 'intercept_legacy_page_queries'), 1);