feat(games): track Reverse: 1999, which resets at 05:00

Adds the r1999 GameId and its metadata, plus GameMeta.resetHourLocal for
the fact that makes it unlike every other game here: it rolls its day at
05:00 server time rather than 04:00, on a single global UTC-5 server, so
its day-key boundary is 10:00 UTC.

resetOffsets could not carry that. Landing 10:00 UTC through the offset
would mean claiming a UTC-6 server, and serverOffsetUtc answers more
questions than this one. The new field overrides RESET_HOUR_LOCAL per game
and is absent everywhere else, so no existing reader's logged day moved —
a test pins that for the games that already had readers.

Both facts are read off the source, not assumed: all 154 rows of the
wiki's event list state (UTC-5) and run 05:00 to 04:59, an event ending
one minute before the reset the next one begins on.

No adapter yet, so the game has no events until one lands.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>

src/shared/daily.ts

@@ -137,6 +137,24 @@ export function serverOffsetUtc(region: Region, game?: LaneId): number {
   return override ?? REGION_RESET_UTC_OFFSET[region];
 }
 
+/**
+ * The hour of its own server day a game rolls over on.
+ *
+ * Almost always `RESET_HOUR_LOCAL`. A game that resets on a different hour says
+ * so in `resetHourLocal` (`games.ts`) — Reverse: 1999 rolls at 05:00 — and that
+ * cannot be folded into `serverOffsetUtc`: shifting a game's stated offset to
+ * land the right reset instant would misreport the server clock to everything
+ * else that asks for it.
+ *
+ * A lane the reader invented has no server to know about and takes the default,
+ * for the same reason `serverOffsetUtc` does.
+ */
+export function resetHourFor(game?: LaneId): number {
+  const override =
+    game === undefined ? undefined : GAMES[game as GameId]?.resetHourLocal;
+  return override ?? RESET_HOUR_LOCAL;
+}
+
 /**
  * Offset from UTC midnight to this game's reset instant.
  *
@@ -147,7 +165,7 @@ export function serverOffsetUtc(region: Region, game?: LaneId): number {
  * a data change, not a constant.
  */
 function shift(region: Region, game?: LaneId): number {
-  return serverOffsetUtc(region, game) * HOUR - RESET_HOUR_LOCAL * HOUR;
+  return serverOffsetUtc(region, game) * HOUR - resetHourFor(game) * HOUR;
 }
 
 /**