fix: retry failed group subpages, add rate-limit detection in scraper

- Detect Wikipedia plain-text rate-limit response ("You are making too many
  requests") and wait 30s before retrying, rather than silently failing
- Increase inter-attempt delay from 3s to 15s per attempt
- Increase group subpage delay from 1.2s to 3s, year delay from 0.6s to 2s
- Re-scrape 1982, 1998, 2002, 2006 which had failed groups; all groups now
  complete — e.g. 2002 now has 64 matches including Group E (Germany/Klose)

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

data/1982/worldcup.groups.json

@@ -54,6 +54,14 @@
         "New Zealand"
       ]
     },
+    {
+      "name": "Group A",
+      "teams": [
+        "Poland",
+        "Belgium",
+        "Soviet Union"
+      ]
+    },
     {
       "name": "Group B",
       "teams": [

data/1982/worldcup.json

@@ -1199,6 +1199,71 @@
       ],
       "ground": "Estadio Benito Villamarín, Seville"
     },
+    {
+      "round": "Second group stage",
+      "group": "Group A",
+      "date": "1982-06-28",
+      "time": "21:00",
+      "team1": "Poland",
+      "team2": "Belgium",
+      "score": {
+        "ft": [
+          3,
+          0
+        ]
+      },
+      "goals1": [
+        {
+          "name": "Zbigniew Boniek",
+          "minute": 4
+        },
+        {
+          "name": "Zbigniew Boniek",
+          "minute": 26
+        },
+        {
+          "name": "Zbigniew Boniek",
+          "minute": 53
+        }
+      ],
+      "ground": "Camp Nou, Barcelona"
+    },
+    {
+      "round": "Second group stage",
+      "group": "Group A",
+      "date": "1982-07-01",
+      "time": "21:00",
+      "team1": "Belgium",
+      "team2": "Soviet Union",
+      "score": {
+        "ft": [
+          0,
+          1
+        ]
+      },
+      "goals2": [
+        {
+          "name": "Khoren Oganesian",
+          "minute": 48
+        }
+      ],
+      "ground": "Camp Nou, Barcelona"
+    },
+    {
+      "round": "Second group stage",
+      "group": "Group A",
+      "date": "1982-07-04",
+      "time": "21:00",
+      "team1": "Soviet Union",
+      "team2": "Poland",
+      "score": {
+        "ft": [
+          0,
+          0
+        ]
+      },
+      "ground": "Camp Nou, Barcelona"
+    },
     {
       "round": "Second group stage",
       "group": "Group B",