perf: bound request work and resource usage (#866)

* perf: bound request work and resource usage

* fix: address performance review regressions

* fix: guard content expiration and dashboard state

* fix: tolerate cache outages and retire derived paths

* fix: revalidate expiration claims and status pagination

* fix: retry interrupted repository metadata cleanup

* fix: retire obsolete content cache storage

* fix: activate tree metadata and recheck expiration claims

* fix: fence cache publication across expiration

* fix: recover staged trees and enforce cache lifecycle cleanup

* fix: prune expired transforms during database outages

* fix: finish conference removals and reload expiration candidates

src/core/model/dashboard-name.ts

@@ -0,0 +1,5 @@
+import { model, Schema } from "mongoose";
+const schema = new Schema({ owner: { type: Schema.Types.ObjectId, required: true },
+  type: { type: String, required: true }, artifactId: { type: String, required: true }, name: String });
+schema.index({ owner: 1, type: 1, artifactId: 1 }, { unique: true });
+export default model("DashboardName", schema);