Add size() cardinality helper across modules (eighth pass).

Standardize a size() method after isEmpty() on every module with clearAll(), delegating to domain counts or snapshot fields so callers can query occupancy without parsing snapshots.

Co-authored-by: Cursor <[email protected]>

consensus-coordination/hyper-p2p-causal-consensus/index.js

@@ -449,6 +449,10 @@ class HyperP2PCausalConsensus extends EventEmitter {
     return this.proposals.size === 0 && this.decidedOrders.size === 0
   }
 
+  size () {
+    return this.proposals.size + this.decidedOrders.size
+  }
+
   async proposeBatch (entries) {
     if (!Array.isArray(entries)) throw new Error('entries array required')
     const out = []