fix(data): add timezone handling for Sports-Reference scrapers and new stadiums

- Add ET timezone (America/New_York) to all Sports-Reference scrapers:
  - NBA: Basketball-Reference times parsed as ET
  - NFL: Pro-Football-Reference times parsed as ET
  - NHL: Hockey-Reference times parsed as ET
  - MLB: Baseball-Reference times parsed as ET
- Document source timezones in scraper docstrings
- Add 11 new stadiums to STADIUM_MAPPINGS:
  - NFL: 5 international venues (Corinthians Arena, Croke Park,
    Olympic Stadium Berlin, Santiago Bernabéu, Tom Benson Hall of Fame)
  - MLS: 4 alternate venues (Miami Freedom Park, Citi Field,
    LA Memorial Coliseum, M&T Bank Stadium)
  - NWSL: 2 alternate venues (Northwestern Medicine Field, ONE Spokane)
- Add 15 stadium aliases for MLS/NWSL team-based lookups
- Fix CanonicalSyncService to sync timezone identifier to SwiftData
- Update debug logging to use stadium timezone for display

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

Scripts/sportstime_parser/scrapers/nba.py

@@ -2,6 +2,7 @@
 
 from datetime import datetime, date, timezone
 from typing import Optional
+from zoneinfo import ZoneInfo
 from bs4 import BeautifulSoup
 import re
 
@@ -45,7 +46,12 @@ class NBAScraper(BaseScraper):
     Sources (in priority order):
     1. Basketball-Reference - Most reliable, complete historical data
     2. ESPN API - Good for current/future seasons
-    3. CBS Sports - Backup option
+    3. CBS Sports - Backup option (not implemented)
+
+    Source Timezones:
+    - basketball_reference: Eastern Time (ET) - times displayed as "7:30p"
+    - espn: UTC - ISO 8601 format with "Z" suffix
+    - cbs: Not implemented
     """
 
     def __init__(self, season: int, **kwargs):
@@ -196,6 +202,25 @@ class NBAScraper(BaseScraper):
                 self._logger.debug(f"Could not parse date: {date_text}")
                 return None
 
+        # Get game start time (format: "7:30p" or "10:00p") - times are in ET
+        time_cell = row.find("td", {"data-stat": "game_start_time"})
+        if time_cell:
+            time_text = time_cell.get_text(strip=True)
+            if time_text:
+                try:
+                    # Parse time like "7:30p" or "10:00p"
+                    # Normalize: "7:30p" -> "7:30 PM", "10:00p" -> "10:00 PM"
+                    time_normalized = time_text.replace("p", " PM").replace("a", " AM")
+                    game_time = datetime.strptime(time_normalized, "%I:%M %p")
+                    # Combine date and time with ET timezone (Basketball-Reference uses ET)
+                    game_date = game_date.replace(
+                        hour=game_time.hour,
+                        minute=game_time.minute,
+                        tzinfo=ZoneInfo("America/New_York"),
+                    )
+                except ValueError:
+                    self._logger.debug(f"Could not parse time: {time_text}, using midnight")
+
         # Get teams
         away_cell = row.find("td", {"data-stat": "visitor_team_name"})
         home_cell = row.find("td", {"data-stat": "home_team_name"})