Combat stats round 6: combat pass converged

Round 5 (with fight durations): TTK anchor validated - mirrors run
22.7/71.2/94.6 s (drone/cruiser/battleship), most fights within
22-72 s, destroyers-vs-dreadnought the accepted 214 s outlier. All
matchups converged: mirrors 5-10%, swarm vs cruisers +15%, frigates
vs battleship +13% (dropped on its own, confirming the noise floor),
dreadnought +3%, glass vs armored +10%, two-to-one 78%, stations 44%.

Two two-round signals actioned per the convergence policy:
battlecruiser hull 2200 -> 2400 (mixed fleet won +20%/+18% twice) and
repair_amount 12 -> 9 (~0.7 HP/s per threat; escorted team held +24%
twice with all frigates surviving). Everything else frozen; further
refinement moves to real-game playtests. Removed the arena
end-condition action item (fixed upstream).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DyCu8vwChKMbLJQ3xosYEN

docs/progression_design.md

@@ -373,9 +373,3 @@ in `requirements.md` and the git history). Still open:
    one matching deposit tile). Touches REQ-BLD-MINER ("every asteroid
    tile is equivalent" no longer holds), REQ-GW-ASTEROID-EXPAND /
    REQ-EXP-*, `world.toml`, and `visuals.toml`.
-6. **Verify the balancing arena end condition.** Arena round 1's
-   station-assault log showed the arena "(running)" with every ship on
-   both sides destroyed — per REQ-BAL-SIM-END the station-less team
-   should have lost the moment its last ship died. Round 2 ended
-   correctly, so it may only be a log-snapshot artifact; confirm, and
-   fix the end condition if it can genuinely idle in that state.