feat(03-01): add NFL team abbreviation aliases

Add NFL entries to TEAM_ABBREV_ALIASES dict:
- Historical relocations: OAK→LV, SD→LAC, STL→LAR
- Common 3-letter variations: JAC, GNB, KAN, NWE, NOR, TAM, SFO
- Direct match for WAS included for completeness

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

Scripts/canonicalize_games.py

@@ -84,6 +84,19 @@ TEAM_ABBREV_ALIASES = {
     ('NHL', 'SJ'): 'team_nhl_sjs',   # San Jose
     ('NHL', 'LA'): 'team_nhl_lak',   # Los Angeles Kings
     ('NHL', 'MON'): 'team_nhl_mtl',  # Montreal
+
+    # NFL
+    ('NFL', 'JAC'): 'team_nfl_jax',   # Jacksonville (JAC vs JAX)
+    ('NFL', 'OAK'): 'team_nfl_lv',    # Oakland → Las Vegas Raiders (moved 2020)
+    ('NFL', 'SD'): 'team_nfl_lac',    # San Diego → Los Angeles Chargers (moved 2017)
+    ('NFL', 'STL'): 'team_nfl_lar',   # St. Louis → Los Angeles Rams (moved 2016)
+    ('NFL', 'GNB'): 'team_nfl_gb',    # Green Bay alternate
+    ('NFL', 'KAN'): 'team_nfl_kc',    # Kansas City alternate
+    ('NFL', 'NWE'): 'team_nfl_ne',    # New England alternate
+    ('NFL', 'NOR'): 'team_nfl_no',    # New Orleans alternate
+    ('NFL', 'TAM'): 'team_nfl_tb',    # Tampa Bay alternate
+    ('NFL', 'SFO'): 'team_nfl_sf',    # San Francisco alternate
+    ('NFL', 'WAS'): 'team_nfl_was',   # Washington (direct match but include for completeness)
 }