Malte Langkabel a90218f5c0 make BuildingSystem stateless: FactoryState becomes a parameter
The member reference is gone. All 23 methods that read or write the factory now
take FactoryState& (const for the two item walks and the checksum fold), so a
BuildingSystem is no longer bound to one state and its signatures say which data
each call touches. It holds only config, belts, rng and the callbacks — the same
shape as AiSystem and CombatSystem.

This completes what phase 2 set out to do; the ownership move landed earlier, but
the systems kept reaching the data through a member until the queries were off
them.

Seeding the asteroid bound moved with the state, and that broke four tests: the
fixtures build their own FactoryState, which defaulted the bound to 0 and refused
every placement on the asteroid. Rather than fix the four call sites, makeFactoryState()
now creates a run's state from the config, and Simulation, ArenaSimulation and the
test fixtures all use it — there is one place that knows what a fresh factory
looks like.

Verified with a golden-checksum capture before and after — all four sample ticks
identical — and by re-running the declaration/definition check over the header.

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YHcUerKAZKWNvSKJxYKbnG
2026-08-04 23:00:09 +02:00
2026-07-12 09:16:49 +02:00
2026-07-22 21:44:20 +02:00
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