refactor(agent): unify agent-scoped event signatures as payload objects

All agent/* and agent-loop/config-start-failed events take one payload
object carrying the agent subject; waterfall/serial payloads require a
signal and keep next as the final argument. PreStepContext and
RequestFailureContext are unfolded into payloads and retired.
goal/changed follows the same shape so agentEvents keeps its listener
error containment. ReactLoopAgent builds its scope carrier once in the
constructor. Regenerates scope resolvers, tool-cordis api catalog, and
docs catalogs; updates all affected listeners, tests, and the
core-data-structures docs (en + zh).

packages/core/agent/src/invariant.ts

@@ -14,7 +14,7 @@ export const inject = ['invariants']
 /** Install the agent contribution into its child registration fiber. */
 const install: InvariantInstaller = (ctx, fail) => {
   const lastStatus = new WeakMap<Agent, AgentStatus>()
-  ctx.on('agent/status', (agent, status) => {
+  ctx.on('agent/status', ({ agent, status }) => {
     const previous = lastStatus.get(agent)
     if (previous === status) {
       fail(`agent/status repeated ${status} (no-op transition)`)