feat: add configurable world scenarios

[christopherjnelson]

Summary

• add server-owned versioned World Lab scenario contracts, deterministic world/roster/spawn generation, preview/apply APIs, and schema-v9 experiment attribution
• generalize the applied roster and model/behavior reconciliation while preserving the exact default Toledo eight-agent scenario
• add the accessible World Setup workflow, bounded Nominatim adapter, dynamic map resolution/count handling, and deterministic density/spawn warnings
• revise the engine-owned objective to durable-influence-v1 without player-threat language
• add browser-driven bounded unattended recovery with separately attributable retry/skip telemetry
• auto-dismiss completed unattended-recovery notices while keeping active recovery and blocking failure states visible

Safety and compatibility

• keeps alliance membership capped at 8 and the existing four-alliance palette
• caps scenarios at 32 agents, H3 resolutions 8–11, radius 40, and 5,000 generated cells
• preserves schema-v5 through schema-v8 import behavior and advances new exports to schema v9
• keeps geocoding explicit, rate-limited, cached, replaceable, and disabled from live calls in default tests
• does not add simultaneous ticks, background scheduling, player mechanics, or player-survival prompt language

Validation

• pnpm validate
• pnpm test:e2e

Both commands pass locally.