fix(rebalancer): validate inventory address protocol coverage at startup

Author: Mo-Hussain

typescript/rebalancer/src/e2e/mixed-weighted.e2e-test.ts

@@ -211,7 +211,10 @@ describe('Mixed WeightedStrategy E2E', function () {
       );
 
     expect(inventoryConfig).to.exist;
-    expect(inventoryConfig!.chains).to.deep.equal([MIXED_INVENTORY_CHAIN]);
+    expect(inventoryConfig!.chains).to.have.members([
+      MIXED_INVENTORY_CHAIN,
+      ...MIXED_MOVABLE_CHAINS,
+    ]);
     expect(rebalancers.map((r) => r.rebalancerType).sort()).to.deep.equal([
       'inventory',
       'movableCollateral',

typescript/rebalancer/src/factories/RebalancerContextFactory.ts

@@ -480,6 +480,19 @@ export class RebalancerContextFactory {
       );
     }
 
+    // Validate inventory address coverage for all required protocols
+    for (const protocol of requiredProtocols) {
+      const chainsForProtocol = allRelevantChains.filter(
+        (chain) =>
+          this.warpCore.multiProvider.getChainMetadata(chain).protocol ===
+          protocol,
+      );
+      assert(
+        inventorySigners[protocol]?.address,
+        `Missing inventory address for protocol ${protocol} (required by inventory chains: ${chainsForProtocol.join(', ')})`,
+      );
+    }
+
     const externalBridgeRegistry: Partial<ExternalBridgeRegistry> =
       externalBridgeRegistryOverride ?? this.buildExternalBridgeRegistry();