fix: resolve specificStadium achievement ID mismatch

The Green Monster (Fenway) and Ivy League (Wrigley) achievements
weren't working because:
1. Symbolic IDs use lowercase sport (stadium_mlb_bos)
2. Sport enum uses uppercase raw values (MLB)
3. Visits store stadium UUIDs, not symbolic IDs

Added resolveSymbolicStadiumId() helper that:
- Uppercases the sport string before Sport(rawValue:)
- Looks up team by abbreviation and sport
- Returns the team's stadiumId as UUID string

Also fixed:
- getStadiumIdsForLeague returns UUID strings (not symbolic IDs)
- AchievementProgress.isEarned computed from progress OR stored record
- getStadiumIdsForDivision queries CanonicalTeam properly

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

.claude/commands/read-to-do.md

@@ -0,0 +1,21 @@
+name: read-to-do
+description: Read and summarize TO-DOS.md before any coding
+trigger:
+  command: "/read-to-do"
+
+actions:
+  - type: read_file
+    path: "TO-DOS.md"
+
+  - type: prompt
+    content: |
+      You have read TO-DOS.md in full.
+
+      Summarize:
+      - Goal
+      - Current Phase
+      - Active Tasks
+
+      Do NOT write any code.
+      Do NOT suggest solutions.
+      Stop after the summary.