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/2006/worldcup.json

@@ -1430,6 +1430,154 @@
       ],
       "ground": "Gottlieb-Daimler-Stadion, Stuttgart"
     },
+    {
+      "round": "Group stage",
+      "group": "Group G",
+      "date": "2006-06-13",
+      "time": "15:00",
+      "team1": "South Korea",
+      "team2": "Togo",
+      "score": {
+        "ft": [
+          2,
+          1
+        ]
+      },
+      "goals1": [
+        {
+          "name": "Lee Chun-soo",
+          "minute": 54
+        },
+        {
+          "name": "Ahn Jung-hwan",
+          "minute": 72
+        }
+      ],
+      "goals2": [
+        {
+          "name": "Mohamed Kader",
+          "minute": 31
+        }
+      ],
+      "ground": "Waldstadion, Frankfurt"
+    },
+    {
+      "round": "Group stage",
+      "group": "Group G",
+      "date": "2006-06-13",
+      "time": "18:00",
+      "team1": "France",
+      "team2": "Switzerland",
+      "score": {
+        "ft": [
+          0,
+          0
+        ]
+      },
+      "ground": "Gottlieb-Daimler-Stadion, Stuttgart"
+    },
+    {
+      "round": "Group stage",
+      "group": "Group G",
+      "date": "2006-06-18",
+      "time": "21:00",
+      "team1": "France",
+      "team2": "South Korea",
+      "score": {
+        "ft": [
+          1,
+          1
+        ]
+      },
+      "goals1": [
+        {
+          "name": "Thierry Henry",
+          "minute": 9
+        }
+      ],
+      "goals2": [
+        {
+          "name": "Park Ji-sung",
+          "minute": 81
+        }
+      ],
+      "ground": "Zentralstadion, Leipzig"
+    },
+    {
+      "round": "Group stage",
+      "group": "Group G",
+      "date": "2006-06-19",
+      "time": "15:00",
+      "team1": "Togo",
+      "team2": "Switzerland",
+      "score": {
+        "ft": [
+          0,
+          2
+        ]
+      },
+      "goals2": [
+        {
+          "name": "Alexander Frei",
+          "minute": 16
+        },
+        {
+          "name": "Tranquillo Barnetta",
+          "minute": 88
+        }
+      ],
+      "ground": "Westfalenstadion, Dortmund"
+    },
+    {
+      "round": "Group stage",
+      "group": "Group G",
+      "date": "2006-06-23",
+      "time": "21:00",
+      "team1": "Togo",
+      "team2": "France",
+      "score": {
+        "ft": [
+          0,
+          2
+        ]
+      },
+      "goals2": [
+        {
+          "name": "Patrick Vieira",
+          "minute": 55
+        },
+        {
+          "name": "Thierry Henry",
+          "minute": 61
+        }
+      ],
+      "ground": "RheinEnergieStadion, Cologne"
+    },
+    {
+      "round": "Group stage",
+      "group": "Group G",
+      "date": "2006-06-23",
+      "time": "21:00",
+      "team1": "Switzerland",
+      "team2": "South Korea",
+      "score": {
+        "ft": [
+          2,
+          0
+        ]
+      },
+      "goals1": [
+        {
+          "name": "Philippe Senderos",
+          "minute": 23
+        },
+        {
+          "name": "Alexander Frei",
+          "minute": 77
+        }
+      ],
+      "ground": "Niedersachsenstadion, Hanover"
+    },
     {
       "round": "Group stage",
       "group": "Group H",