FE-1237: Add optional per-place token capacity - #9177
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A place can declare a maximum token count, which participates in transition enablement the standard way: a transition cannot fire if it would take an output place above capacity. Output tokens apply at the end of a frame, so the check folds in what earlier transitions this frame already committed. Deadlock detection uses the same check, so a net blocked only by full output places is reported as deadlocked rather than stepping to maxTime doing nothing. Nets without capacities keep empty constraint tables and skip the check.
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🌟 What is the purpose of this PR?
Adds an optional per-place token capacity, set from the place properties panel.
Requested for supply-chain modelling with finite storage. It also converts frames from growable to fixed-size, which the GPU backend (#9179) requires.
🔗 Related links
🚫 Blocked by
🔍 What does this change?
A transition cannot fire if firing would take an output place above its capacity. This is the standard Petri-net capacity constraint.
maxTimePre-Merge Checklist 🚀
🚢 Has this modified a publishable library?
This PR:
📜 Does this require a change to the docs?
The changes in this PR:
🕸️ Does this require a change to the Turbo Graph?
The changes in this PR:
An initial marking that already exceeds a capacity is not rejected. Enablement blocks transitions; it does not repair state.
🐾 Next steps
The fixed-size frame layout (SoA, WASM linear memory) is not built here. The runtime still uses growable frames.
🛡 What tests cover this?
engine/capacity.test.ts(constraint tables, headroom check),monte-carlo/capacity.test.ts(end-of-frame accumulation across several transitions feeding one place, deadlock reporting).❓ How to test this?