Add point-based award system with station-specific values

Implement a new award type where stations have different point values.
Each confirmed QSO with a special station adds its points to the total.

New Award: Special Stations Award
- 10-point stations: DF2ET, DJ7NT, HB9HIL, LA8AJA
- 5-point stations: DB4SCW, DG2RON, DG0TM, DO8MKR
- Target: 50 points to complete

Backend Changes
- Add support for 'points' award type
- Add calculatePointsAwardProgress() for point calculation
- Add getPointsAwardEntityBreakdown() for station details
- Track worked, confirmed, and totalPoints separately

Frontend Changes
- Awards page: Show stations and points for point awards
- Details page: Show point summary cards
- Details page: Show points badge next to station callsign
- Gold/amber gradient badge for point values

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/frontend/static/award-definitions/special-stations.json

@@ -0,0 +1,20 @@
+{
+  "id": "special-stations",
+  "name": "Special Stations Award",
+  "description": "Contact special stations to earn points - reach 50 points to complete",
+  "category": "special",
+  "rules": {
+    "type": "points",
+    "target": 50,
+    "stations": [
+      { "callsign": "DF2ET", "points": 10 },
+      { "callsign": "DJ7NT", "points": 10 },
+      { "callsign": "HB9HIL", "points": 10 },
+      { "callsign": "LA8AJA", "points": 10 },
+      { "callsign": "DB4SCW", "points": 5 },
+      { "callsign": "DG2RON", "points": 5 },
+      { "callsign": "DG0TM", "points": 5 },
+      { "callsign": "DO8MKR", "points": 5 }
+    ]
+  }
+}