Repair concurrent Graph recovery, Source Job residency and developer source provisioning

src/execution-world/metadata.ts

@@ -22,6 +22,9 @@ export class CandidateMetadataBudget {
   snapshot() {
     return { bytes: this.bytes, candidates: this.scopes, owners: this.owners.size, limits: this.limits };
   }
+  ownedBytes(owner: string) {
+    return this.owners.get(owner) ?? 0;
+  }
   acquire(owner: string) {
     if (!owner || owner.length > 4096) throw Error("INVALID_CANDIDATE_METADATA_OWNER");
     if (this.scopes >= this.limits.candidates) throw Error("CANDIDATE_METADATA_LIMIT");