feat(common): sports_rankings -- the reconciled rankings (sports family 8) (#789)

* feat(common): sports_rankings -- the reconciled rankings family (sports family 8)

New hardware-free module src/common/sports_rankings.py, copied from
ledmatrix-plugins claude/family8-reconcile once the nine scoreboards made
_fetch_team_rankings, _choose_poll (three bodies each),
_load_division_team_ids, _passes_other_filters, _best_rank and
_is_ranked_game (two each) one body each. All of them live on the plugins'
SportsCore, so one mixin, SportsRankingsMixin, carries exactly those six
plus _ranked_positions and _poll_season_ended and the constants they read;
no manager gains a method it lacks today.

- Ranks are kept by ESPN team id as well as abbreviation, and a game with
  ids is ranked by id (ESPN lists Ohio State and Ohio State Newark both as
  OSU). The badge still reads the abbreviation table.
- A poll whose season's endDate has passed loads nothing, so no badge shows
  and the "ranked" filter fails open between seasons (ESPN served April's
  college basketball poll on 2026-10-12); read from the payload, no
  calendar, no sport names.
- College football's division rosters are asked for the season year
  (football's July rule; only that league has rosters, so no seam).
- choose_top_division_poll(): the one poll rule, for the dynamic team
  resolvers that expand AP_TOP_n.

- test/test_sports_rankings.py: the plugins' pinned cases (poll choice,
  which leagues are asked, payload shapes, hourly cache, the finished-season
  rows, the rosters' season year and caching, ranked/best rank/filter over
  colliding abbreviations), plus the host contract. Mutation-checked.
- test/test_sports_rankings_parity.py: with LEDMATRIX_PLUGINS, compares each
  body and constant with every plugin copy. Passes against
  claude/family8-reconcile; fails against the pre-reconcile tree.
- mypy ratchet, src/common/README.md, CHANGELOG (Unreleased, New modules).
- sports_shared and sports_rotation docstrings: the three methods leave the
  "stay per-plugin" list.
- docs/SPORTS_UNIFICATION.md: family 8 status and decisions; item 8 restated
  to match what measuring found (the standings branch never ran; the season
  year only matters to college football).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* docs: cite ledmatrix-plugins #645 for the family 8 reconcile

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* ci: re-run code scanning (the Python analysis job never started)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

mypy-clean.txt

@@ -41,6 +41,7 @@ src/common/sports_font_path.py
 src/common/sports_game_over.py
 src/common/sports_live_scroll.py
 src/common/sports_plugin_host.py
+src/common/sports_rankings.py
 src/common/sports_rotation.py
 src/common/sports_scroll.py
 src/common/sports_timezone.py