feat: add 2026 WNBA expansion teams Toronto Tempo and Portland Fire

[madhavcodez]

Adds the two franchises that began play in May 2026, bringing wnba_teams to 15 entries.

• Toronto Tempo (TOR, id 1611661332): first WNBA team based outside the US. State field is "Ontario", matching the Toronto Raptors precedent in nba_teams.
• Portland Fire (POR, id 1611661327): revives the 2000-2002 Portland franchise name. The league reassigned the original team_id to the new expansion team, so the ID is reused intentionally.

Updates test_wnba_teams from 13 to 15 and adds
test_wnba_2026_expansion_teams_present to pin the lookups via find_wnba_team_by_abbreviation and find_wnba_team_name_by_id.

Fixes #666

[madhavcodez]

Heads up on the red checks — the 2 failures are the pre-existing test_get_request_url cases in tests/unit/live/endpoints/ that hit the live CDN with a stale 2021 game ID. They fail identically on master and were called out in #671 as unrelated to that PR; same applies here. This diff is constrained to wnba_teams static data + a static-data unit test, no live endpoints touched.

Local pytest tests/unit/stats/static/ → 90 passed (521 passed total, same 2 failures).