Repair packed agent startup and bound activation metadata retention

src/execution-world/metadata.ts

@@ -9,7 +9,11 @@ export class CandidateMetadataBudget {
   private bytes = 0;
   private scopes = 0;
   private readonly owners = new Map<string, number>();
-  constructor(limits = { bytes: 512 * 1024 * 1024, ownerBytes: 256 * 1024 * 1024, candidates: 128 }) {
+  // A cutover holds both the serving and proposed installation plus transient
+  // parsing space. The 57-repository reader retains ~133 MiB per installation;
+  // a 256 MiB owner ceiling cannot admit its ordinary atomic replacement.
+  // Keep the aggregate ceiling independent and leave room for parsing overlap.
+  constructor(limits = { bytes: 512 * 1024 * 1024, ownerBytes: 384 * 1024 * 1024, candidates: 128 }) {
     for (const value of Object.values(limits))
       if (!Number.isSafeInteger(value) || value < 1) throw Error("INVALID_CANDIDATE_METADATA_BUDGET");
     if (limits.ownerBytes > limits.bytes) throw Error("INVALID_CANDIDATE_METADATA_BUDGET");