feat: add CS Major autochess tournament

CHANGELOG.md

@@ -1,5 +1,38 @@
 # Changelog
 
+## alpha 0.6.4.1015
+
+- Add a reviewed 2-8 player CS Major autochess extension with a fixed
+  five-player starting lineup, one always-active coach, an eight-slot bench,
+  and a six-candidate shop that shows complete game data.
+- Ship a fixed 60-player local pool with rifle, sniper, and in-game-leader
+  roles; team and nation synergies; shared copy counts; and deterministic
+  three-copy/two-star and nine-copy/three-star upgrades.
+- Keep all five player slots occupied. Lineup changes are one-for-one swaps,
+  starters cannot be sold directly, and coach upgrades only add a 2%-10%
+  team bonus.
+- Add player-selected firepower, stability, and clutch tactics. Resolve
+  stability over firepower, firepower over clutch, clutch over stability,
+  plus sniper/rifle/leader role counters before bounded +/-2% map variance.
+- Generate the competition format once at tournament start: two players go
+  directly to the final, three play a round robin for two final places, four
+  use seeded 1v4 and 2v3 semifinals, and five to eight play a complete round
+  robin for four semifinal places.
+- Add an explicit three-human-plus-one-AI test mode. The host can add one
+  deterministic local AI as seed four; it buys players, upgrades its coach,
+  swaps its strongest lineup, and selects a counter tactic without an online
+  model.
+- Give Taffy a persistent host state machine: welcome and format briefing,
+  rotating human preparation order, turn enforcement, explicit handoffs,
+  round introductions, matchup calls, overtime narration, advancement, and
+  championship presentation.
+- Run group matches as BO3 and knockout matches as BO5. Simulate every map
+  under MR15, including 15-15 overtime, 19-17/22-20 scores, and separately
+  archived overtime stories.
+- Persist run state, idempotent action responses, structured battles, and
+  every generated story in serialized SQLite transactions. Invalid archives
+  roll back the full action.
+
 ## alpha 0.6.3.1015
 
 - Replace instant personal lottery tickets with one persistent multiplayer