feat(common): sports_game_over -- the reconciled game-over check (sports family 5) (#770)

* feat(common): sports_game_over -- the reconciled game-over check (sports family 5)

New hardware-free module src/common/sports_game_over.py with
SportsGameOverMixin._is_game_really_over, the scoreboards' SportsLive check
that drops a game ESPN still lists as live, copied from ledmatrix-plugins
claude/family5-reconcile once the nine copies (five bodies) became one.

Over on a final period text; from period FINAL_PERIOD on, also on a 0:00
clock string unless the score is level (a tie at the end of regulation goes
to overtime; a game that ends tied ends on its final status). FINAL_PERIOD
is the one per-sport seam, a class attribute defaulting to None (the clock
never ends a game); the scoreboards declare 3 (hockey), 4 (basketball,
football, lacrosse) or None (afl, nrl, soccer, baseball, ufc).

- test/test_sports_game_over.py: the plugins' pinned matrix folded to the
  three FINAL_PERIOD values, edge shapes, the tie guard, ufc's recorded
  ESPN MMA states, an override deferring through super() (baseball), the
  base order with SportsLiveSharedMixin._detect_stale_games, host contract.
- test/test_sports_game_over_parity.py: with LEDMATRIX_PLUGINS, compares the
  body with every plugin copy (drift-report normalisation plus decorators)
  and each plugin's FINAL_PERIOD with the owner's decision.
- mypy ratchet, src/common/README.md, CHANGELOG (Unreleased, New modules).
- docs/SPORTS_UNIFICATION.md: family 5 status and decisions; the seam
  tables now match the code (FINAL_PERIOD defaults to None; the
  CLOCK_COUNTS_DOWN seam never existed and is gone from the doc).

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

* docs: cite ledmatrix-plugins #625 for the family 5 reconcile

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

---------

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

src/common/README.md

@@ -46,6 +46,7 @@ Rules for the package:
 | [`sports_display_rules`](#sports_display_rules) | Which games a scoreboard shows, for how long, and its scorebug date line | Yes (scoreboards) | 3.8.0 |
 | [`sports_fetch`](#sports_fetch) | Scoreboard season fetch, lookback and live-odds decisions | Yes (scoreboards) | 3.7.0 |
 | [`sports_font_path`](#sports_font_path) | Find a scoreboard's bundled font whatever the cwd | Yes (scoreboards) | 3.8.0 |
+| [`sports_game_over`](#sports_game_over) | Whether a game ESPN still lists as live has ended | Yes (scoreboards) | next release |
 | [`sports_game_renderer`](#sports_game_renderer) | Scoreboard scroll/Vegas card geometry | Yes (scoreboards) | 3.3.0 |
 | [`sports_helpers`](#sports_helpers) | Small helpers every scoreboard `sports.py` copies | Yes (scoreboards) | 3.5.0 |
 | [`sports_live_scroll`](#sports_live_scroll) | Rebuild a live scroll strip mid-cycle without moving it | Yes (scoreboards) | 3.8.0 |
@@ -294,6 +295,16 @@ path as given when it exists (relative to the cwd), else
 `font_layout.resolve_asset_path(path)`. What the scoreboards'
 `_resolve_font_path` copies return on a core that ships it.
 
+### sports_game_over
+
+[`sports_game_over.py`](sports_game_over.py). `SportsGameOverMixin`:
+`_is_game_really_over(game)`, the `SportsLive` check that drops a game ESPN
+still lists as live (`SportsLiveSharedMixin._detect_stale_games` calls it).
+Over on a final period text, or on a 0:00 clock from period `FINAL_PERIOD`
+on unless the score is level. `FINAL_PERIOD` is a class attribute the host
+sets per sport; the default `None` means the clock never ends a game. List
+it before `SportsLiveSharedMixin`.
+
 ### sports_game_renderer
 
 [`sports_game_renderer.py`](sports_game_renderer.py).