docs: teach graph generator the scoped-dispatch spellings; sync Agent type-equiv block

The producer/consumer matrix reads dispatch sites statically; the fused
agentEvents dispatcher, the agent's loopCtx handle, the session store's
captured emitCtx, and carrier-first argument lists were invisible to it,
silently dropping agent-loop/session as producers of every scoped event.
The generator now recognizes those spellings; the Agent type-equiv doc
block gains readonly ctx.

docs/core-data-structures/core.md

@@ -244,6 +244,14 @@ interface Agent {
   readonly session: Session
   readonly status: AgentStatus
 
+  /**
+   * The agent's scope context (`@deepseek-ai/dsh-scope`, key = this agent):
+   * registrations through it — tools, prompt sections/variables, listeners,
+   * restrictions — are visible to this agent only and unwind when it is
+   * disposed; `agent.ctx.on('agent/…')` listeners fire only for this agent.
+   */
+  readonly ctx: Context
+
   /** Queue a user message. Starts a turn when idle; otherwise waits for the next turn. */
   send(content: ContentBlock[], options?: SendOptions): void