feat(forms): add form_binding, form_subjects, form_filter_registry, form_builder configs

Groundwork for S2+ services. Entity Column Registry whitelists valid
Pattern A/C binding targets; subject-type registry enforces morph-map;
filter registry separates filterable columns from bindable ones; builder
config holds limits, webhook policy, captcha, retention, feature flags.
Adds dedicated 'webhooks' Redis queue connection (retry_after 120s).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

api/config/form_binding.php

@@ -0,0 +1,57 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+|--------------------------------------------------------------------------
+| Entity Column Registry (form builder binding targets)
+|--------------------------------------------------------------------------
+|
+| Authoritative whitelist of columns a form_field.binding may target.
+| Only listed columns are valid Pattern A (entity_owned) / Pattern C
+| (mirrored) binding targets — see ARCH-FORM-BUILDER.md §6.2.
+|
+| 'writable' gates Form Request validation at save time.
+| 'admin_only' hides the column from non-admin binding pickers.
+|
+*/
+
+return [
+
+    'user_profile' => [
+        'bio' => ['type' => 'text', 'label' => 'Bio', 'writable' => true],
+        'photo_url' => ['type' => 'image', 'label' => 'Profielfoto', 'writable' => true],
+        'emergency_contact_name' => ['type' => 'string', 'label' => 'Noodcontact naam', 'writable' => true],
+        'emergency_contact_phone' => ['type' => 'string', 'label' => 'Noodcontact telefoon', 'writable' => true],
+    ],
+
+    'person' => [
+        'first_name' => ['type' => 'string', 'label' => 'Voornaam', 'writable' => true],
+        'last_name' => ['type' => 'string', 'label' => 'Achternaam', 'writable' => true],
+        'email' => ['type' => 'string', 'label' => 'E-mail', 'writable' => true],
+        'phone' => ['type' => 'string', 'label' => 'Telefoon', 'writable' => true],
+        'date_of_birth' => ['type' => 'date', 'label' => 'Geboortedatum', 'writable' => true],
+        'admin_notes' => ['type' => 'text', 'label' => 'Notities', 'writable' => true, 'admin_only' => true],
+    ],
+
+    'company' => [
+        'contact_first_name' => ['type' => 'string', 'label' => 'Contact voornaam', 'writable' => true],
+        'contact_last_name' => ['type' => 'string', 'label' => 'Contact achternaam', 'writable' => true],
+        'contact_email' => ['type' => 'string', 'label' => 'Contact e-mail', 'writable' => true],
+        'contact_phone' => ['type' => 'string', 'label' => 'Contact telefoon', 'writable' => true],
+    ],
+
+    'artist' => [
+        // populated when artist module lands
+    ],
+
+    'organisation' => [
+        'name' => ['type' => 'string', 'label' => 'Organisatienaam', 'writable' => true],
+        'slug' => ['type' => 'string', 'label' => 'Slug', 'writable' => true],
+        'contact_name' => ['type' => 'string', 'label' => 'Contactpersoon', 'writable' => true],
+        'contact_email' => ['type' => 'string', 'label' => 'Contact-e-mail', 'writable' => true],
+        'phone' => ['type' => 'string', 'label' => 'Telefoon', 'writable' => true],
+        'website' => ['type' => 'string', 'label' => 'Website', 'writable' => true],
+    ],
+
+];