Add replayable debug reports.

A report dumps everything needed to understand a game that went wrong:
the full state (decks card by card, shop row and tier deck order,
discards, pending choices, banked Mana/Trumpets/apples), the round's
battles, and the whole event log. Available as JSON, which replays, or
text, which reads — and the text ends with a paste-ready repro test.

Battles now record the randomness they consume alongside what they
started from, so a result can be replayed long after the round cleared
those banks: same lineups, same dice, same events, down to the log text.
Results predating the recording say so rather than quietly re-rolling.

Three ways in: the 🐛 panel's download/copy buttons, GET
/api/debug/report (DEBUG-only, since a report holds both players' hands
and the shop deck order), and `mise run report`, which reads the
database directly so a live game can be dumped without DEBUG.

mise.toml

@@ -30,6 +30,10 @@ description = "Build everything: frontend + server binary (bin/server)"
 depends = ["build-web"]
 run = "go build -o bin/server ./cmd/server"
 
+[tasks.report]
+description = "Dump a game's debug report (no args: list recent games)"
+run = "go run ./cmd/report"
+
 [tasks.test]
 description = "Run all Go tests"
 run = "go test ./..."