feat: add captcha-backed forum security hardening

app/Models/ForumPost.php

@@ -18,15 +18,28 @@ class ForumPost extends Model
         'id',
         'thread_id',
         'topic_id',
+        'source_ip_hash',
         'user_id',
         'content',
+        'content_hash',
         'is_edited',
         'edited_at',
         'spam_score',
         'quality_score',
+        'ai_spam_score',
+        'ai_toxicity_score',
+        'behavior_score',
+        'link_score',
+        'learning_score',
+        'risk_score',
+        'trust_modifier',
         'flagged',
         'flagged_reason',
         'moderation_checked',
+        'moderation_status',
+        'moderation_labels',
+        'moderation_meta',
+        'last_ai_scan_at',
     ];
 
     public $incrementing = true;
@@ -36,8 +49,18 @@ class ForumPost extends Model
         'edited_at' => 'datetime',
         'spam_score' => 'integer',
         'quality_score' => 'integer',
+        'ai_spam_score' => 'integer',
+        'ai_toxicity_score' => 'integer',
+        'behavior_score' => 'integer',
+        'link_score' => 'integer',
+        'learning_score' => 'integer',
+        'risk_score' => 'integer',
+        'trust_modifier' => 'integer',
         'flagged' => 'boolean',
         'moderation_checked' => 'boolean',
+        'moderation_labels' => 'array',
+        'moderation_meta' => 'array',
+        'last_ai_scan_at' => 'datetime',
     ];
 
     public function thread(): BelongsTo