feat: add skip_if support to collect_and_post flow fields

Allows fields to declare a skip_if condition so the bot skips them
based on previously collected values — used for eps/diagnostico fields
that only apply when novedad is an incapacidad type.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

services/NormalBot.php

@@ -509,6 +509,7 @@ class NormalBot
             $cap['collected_labels'][$field['key']] = $value;
             unset($cap['__awaiting_other']);
             $cap['index'] = $idx + 1;
+            while ($cap['index'] < count($fields) && self::capShouldSkip($fields[$cap['index']], $cap['collected'])) { $cap['index']++; }
             $meta['__cap'] = $cap;
             ConversationContext::updateMetadata($ctxId, $meta);
             if ($cap['index'] < count($fields)) {
@@ -566,6 +567,7 @@ class NormalBot
         }
 
         $cap['index'] = $idx + 1;
+        while ($cap['index'] < count($fields) && self::capShouldSkip($fields[$cap['index']], $cap['collected'])) { $cap['index']++; }
         $meta['__cap'] = $cap;
         ConversationContext::updateMetadata($ctxId, $meta);
 
@@ -713,6 +715,17 @@ class NormalBot
         return self::sendText($text, $to, $company);
     }
 
+    // skip_if: {"field":"novedad_id","not_in":["35","41"]} → skip this field if collected[field] not in list
+    private static function capShouldSkip(array $field, array $collected): bool
+    {
+        $si = $field['skip_if'] ?? null;
+        if (!$si) return false;
+        $val = (string)($collected[$si['field'] ?? ''] ?? '');
+        if (isset($si['not_in'])) return !in_array($val, array_map('strval', $si['not_in']));
+        if (isset($si['equals'])) return $val !== (string)$si['equals'];
+        return false;
+    }
+
     private static function capFieldLabel(array $fields, string $key): string
     {
         foreach ($fields as $f) {
@@ -1128,6 +1141,7 @@ class NormalBot
                     $cap['collected_labels'][$field['key']] = $pending['label'];
                     unset($cap['__lookup_pending']);
                     $cap['index'] = $idx + 1;
+                    while ($cap['index'] < count($fields) && self::capShouldSkip($fields[$cap['index']], $cap['collected'])) { $cap['index']++; }
                     $meta['__cap'] = $cap;
                     ConversationContext::updateMetadata($ctxId, $meta);
                     if ($cap['index'] < count($fields)) {