feat(03-02): add WNBA to canonicalization pipeline

- Import WNBA_TEAMS from wnba module
- Add WNBA_DIVISIONS dict (single league structure, no divisions)
- Add WNBA to sport_mappings for team canonicalization
- Update arena_key to use 'arena' for WNBA (like NBA/NHL)
- Add WNBA team abbreviation aliases (LV, LAS, NYL, PHX, etc.)
- Add WNBA stadium aliases (Michelob Ultra Arena, Gateway Center, etc.)

Total teams: 167 (13 WNBA teams added)

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

Scripts/canonicalize_games.py

@@ -109,6 +109,14 @@ TEAM_ABBREV_ALIASES = {
     ('MLS', 'FCD'): 'team_mls_dal',    # FC Dallas
     ('MLS', 'MON'): 'team_mls_mtl',    # Montreal
     ('MLS', 'LAF'): 'team_mls_lafc',   # LAFC alt
+
+    # WNBA
+    ('WNBA', 'LV'): 'team_wnba_lva',    # Las Vegas Aces
+    ('WNBA', 'LAS'): 'team_wnba_la',    # LA Sparks
+    ('WNBA', 'NYL'): 'team_wnba_ny',    # New York Liberty
+    ('WNBA', 'PHX'): 'team_wnba_pho',   # Phoenix Mercury
+    ('WNBA', 'CONN'): 'team_wnba_con',  # Connecticut Sun
+    ('WNBA', 'WSH'): 'team_wnba_was',   # Washington Mystics
 }