Merge develop into T-693 and reconcile Subject behavior with Memory information

Normal merge of develop@b0bce50b retains T-692 state hierarchy, diagnostics disclosures, ready-empty and candidate-only regressions alongside T-693 behavior/CAS/route fences. ResidentContext load and refresh retain the five-second timeout from 685b8aa6, with a seven-request regression.

Validation: root cargo check; full worker(serial), session-store, workspace-server and server-api(typescript) suites; frontend check with zero diagnostics; 464 Web tests and 171 component tests (19 Memory); production Memory browser-shell test/build; fmt/diff/OpenAPI checks.

tools/web-ux/browser-tests/memory_document_fixture_server.ts

@@ -73,6 +73,7 @@ const subjects = [
     42,
     "Prefer explicit evidence over assumptions.\nAsk before irreversible actions, and state uncertainty plainly.",
     3,
+    connectedWorker("Release coordination Worker with a deliberately long display name"),
   ),
   subject(emptySubjectId, "Empty ready subject", "active", 0),
   subject(staleSubjectId, "Stale surface subject", "active", 19),
@@ -82,6 +83,30 @@ const subjects = [
 ];
 const pagedSubject = subject(pagedSubjectId, "Subject on the next page", "active", 1);
 
+function connectedWorker(displayName: string) {
+  return {
+    runtime_id: "embedded-worker-runtime",
+    worker_id: "release-coordination-worker",
+    host_id: "fixture-host",
+    display_name: displayName,
+    label: displayName,
+    profile: "builtin:companion",
+    singleton_key: `subjektiv:${representativeSubjectId}`,
+    tags: [],
+    workspace: {
+      visibility: "workspace",
+      identity: workspaceId,
+      workspace_id: workspaceId,
+    },
+    state: "idle",
+    last_seen_at: "2026-01-02T03:04:05Z",
+    pinned: false,
+    retention_state: "retained",
+    implementation: { kind: "embedded", display_hint: "Fixture Worker" },
+    diagnostics: [],
+  };
+}
+
 function subject(
   id: string,
   role: string,
@@ -89,6 +114,7 @@ function subject(
   storeRevision: number,
   behaviorMd = "",
   behaviorRevision = 0,
+  currentWorker?: ReturnType<typeof connectedWorker>,
 ) {
   return {
     id,
@@ -99,6 +125,7 @@ function subject(
     store_revision: storeRevision,
     created_at: "2026-01-01T00:00:00Z",
     updated_at: "2026-01-02T03:04:05Z",
+    ...(currentWorker ? { current_worker: currentWorker } : {}),
   };
 }
 
@@ -141,7 +168,7 @@ function memoriesFor(subjectId: string) {
       1,
       "working_assumption",
       "retracted",
-      "T-672 UNIQUE END MARKER",
+      "Memory list end marker for scroll validation",
     ),
   ];
 }
@@ -251,7 +278,7 @@ function memoryDetail(memoryId: string, requestedRevision: number | null) {
         evidence_id: "evidence-message-0001",
         origin: { kind: "human_input", account_id: "account-fixture" },
         evidence_kind: "message",
-        label: "T-672 product direction",
+        label: "Memory information design source",
         summary: "Bounded source reference retained with the committed revision.",
       }],
       source_refs_total: 1,