Fix STV (Stevenage): HTTPS migration and certificate verification bypass

The scraper was using http://democracy.stevenage.gov.uk which causes wreq to
attempt an IPv6 (AAAA) DNS lookup that returns ServFail from Stevenage's DNS
server, causing a hard failure. Switching to https:// bypasses this path.

The https:// endpoint has an untrusted certificate (not in wreq's BoringSSL
bundle), so verify_requests = False is also needed to allow the connection.

With both changes the ModGov ASMX endpoint returns valid XML: 39 councillors,
39 with photos, 0 emails (council does not publish email addresses via ModGov).

Author: Claude Code

scrapers/STV-stevenage/councillors.py

@@ -2,4 +2,4 @@
 
 
 class Scraper(ModGovCouncillorScraper):
-    pass
+    verify_requests = False

scrapers/STV-stevenage/metadata.json

@@ -14,7 +14,7 @@
     },
     "services": {
         "councillors": {
-            "base_url": "http://democracy.stevenage.gov.uk",
+            "base_url": "https://democracy.stevenage.gov.uk",
             "cms_type": "ModernGov"
         }
     }