refactor(tasks): unify the shared task run registry (#57324)

* refactor(tasks): simplify shared task run registry

* refactor(tasks): remove legacy task registry aliases

* fix(cron): normalize timeout task status and harden ledger writes

* fix(cron): keep manual runs resilient to ledger failures

src/gateway/server-methods/agent.test.ts

@@ -846,7 +846,6 @@ describe("gateway agent handler", () => {
       );
 
       expect(findTaskByRunId("task-registry-agent-run")).toMatchObject({
-        source: "background_cli",
         runtime: "cli",
         childSessionKey: "agent:main:main",
         status: "running",

src/gateway/server-methods/agent.ts

@@ -191,8 +191,8 @@ function dispatchAgentRunFromGateway(params: {
   if (params.ingressOpts.sessionKey?.trim()) {
     try {
       createTaskRecord({
-        source: "background_cli",
         runtime: "cli",
+        sourceId: params.runId,
         requesterSessionKey: params.ingressOpts.sessionKey,
         requesterOrigin: normalizeDeliveryContext({
           channel: params.ingressOpts.channel,
@@ -202,7 +202,6 @@ function dispatchAgentRunFromGateway(params: {
         }),
         childSessionKey: params.ingressOpts.sessionKey,
         runId: params.runId,
-        bindingTargetKind: "session",
         task: params.ingressOpts.message,
         status: "running",
         deliveryStatus: "not_applicable",