v0.1 architecture milestone: stitch the seed contracts into one bounded execution path

[phenomenoner]

Goal

Turn the current docs-first seed repo into one bounded v0.1 implementation path with stable contracts and a clean first backlog.

Child issues

• CLI MVP: validate and inspect auth/card/deck manifests #1 CLI MVP: validate and inspect auth/card/deck manifests
• Card contract MVP: schema-validate symbol pools, exits, capital controls, and feature requirements #2 Card contract MVP: schema-validate symbol pools, exits, capital controls, and feature requirements
• Replay runner MVP: recordable market data, replay-sim, and comparable receipts #3 Replay runner MVP: recordable market data, replay-sim, and comparable receipts
• Adapter MVP: shared AuthSessionManager and first TW cash adapter shims #4 Adapter MVP: shared AuthSessionManager and first TW cash adapter shims
• Observability MVP: recorder, decision receipts, and account/user_def routing provenance #5 Observability MVP: recorder, decision receipts, and account/user_def routing provenance
• Risk MVP: emergency stop, forced exit, and final-auction flatten policy #6 Risk MVP: emergency stop, forced exit, and final-auction flatten policy

Exit criteria

• concrete runtime models exist for event, feature, intent, risk, and execution boundaries
• replay/live-sim are on a believable path before any live claims expand
• auth/session capability boundaries are explicit
• day-trading exits and routing hygiene are treated as product requirements