Add attr_cursoid + attr_utm_source as 4th lead attribution path

For PMX/Search campaigns, match leads by course number and UTM source
when direct campaign ID attribution is missing. Fixes campaigns like
fco_pmx_436 (2→48 leads) and fco_pmx_1525 (0→84 leads).

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

airtable_client.py

@@ -339,24 +339,45 @@ class AirtableClient:
     def get_leads_this_month_gads(self, campaign_id: str, campaign_name: str = "") -> tuple[int, list[str]]:
         """
         Leads del mes actual para una campaña de Google Ads.
-        Cubre tres vías de atribución:
+        Cubre cuatro vías de atribución:
           1. GACampaignID / GoogleCampaignID (leads web normales)
           2. gad_campaignid en attr_referer (UTM web)
           3. attr_referer = campaign_name con UserAgent Google-Ads-Notifications (Lead Form)
+          4. attr_cursoid = course_num AND attr_utm_source = 'pmx'|'google' (atribución por curso)
         """
         now = datetime.now()
         mes_inicio = f"{now.year}-{now.month:02d}-01"
+
         leadform_clause = (
             f"AND({{attr_referer}}='{campaign_name}',{{UserAgent del visitante}}='Google-Ads-Notifications')"
             if campaign_name else "FALSE()"
         )
+
+        # Extraer número de curso y tipo de fuente del nombre de campaña
+        curso_clause = "FALSE()"
+        m = re.search(r'fco_(?:search|pmx)_(\d+)', campaign_name, re.IGNORECASE)
+        if m:
+            course_num = m.group(1)
+            if "pmx" in campaign_name.lower() and "_leadform" not in campaign_name.lower():
+                utm_source = "pmx"
+            elif "search" in campaign_name.lower():
+                utm_source = "google"
+            else:
+                utm_source = None
+            if utm_source:
+                curso_clause = (
+                    f"AND({{attr_cursoid}}='{course_num}',"
+                    f"{{attr_utm_source}}='{utm_source}')"
+                )
+
         formula = (
             f"AND("
             f"OR("
             f"{{GACampaignID}}='{campaign_id}',"
             f"FIND(',{campaign_id},',',' & {{GoogleCampaignID}} & ','),"
             f"FIND('gad_campaignid={campaign_id}',{{attr_referer}}),"
-            f"{leadform_clause}"
+            f"{leadform_clause},"
+            f"{curso_clause}"
             f"),"
             f"{{creado}}>='{mes_inicio}'"
             f")"