docs(events): fix stale turn-mirror / tools-execute prose caught in review

Codex review of the interception-seams merge flagged current-state prose still
describing removed/renamed surfaces:

- packages/core/agent/src/types.ts module doc: the agent/* "transient emits"
  list still ended with "the turn boundaries" — corrected to state turn/step
  boundaries are durable session/event records, not agent/* emits, and to list
  the actual interception seams (prompt-submit/pre-step/request/step-result/
  turn-continuation) + agent/session-start.
- interception-seams RFC: "agent/turn-end fires and the ACP bridge settles" →
  the durable turn/end is appended and ACP settles off it (no turn mirror).
- two proposed RFCs (acp-agent-client-protocol, optional-code-mode) named the
  pre-split `tools/execute` waterfall → the `tools/pre-execute`/`tools/post-execute`
  pair.

Regenerated the cordis catalog (module-doc change). No code/behavior change.

docs/cordis-catalog/events-and-services.md

@@ -25,7 +25,7 @@ An agent was registered in the AgentRegistry and is ready to receive messages.
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:227`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:229`](../../packages/core/agent/src/types.ts)
 
 #### `agent/disposed` — emit
 
@@ -37,7 +37,7 @@ An agent was disposed and removed from the registry; its fiber and any in-flight
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:233`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:235`](../../packages/core/agent/src/types.ts)
 
 #### `agent/error` — emit
 
@@ -49,7 +49,7 @@ A step or turn errored. The loop reports a failure here (plus the logger) even w
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:352`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:354`](../../packages/core/agent/src/types.ts)
 
 #### `agent/pre-step` — serial
 
@@ -63,7 +63,7 @@ Serial (awaited in registration order), not a waterfall: a listener mutates the
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:299`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:301`](../../packages/core/agent/src/types.ts)
 
 #### `agent/prompt-submit` — waterfall
 
@@ -75,7 +75,7 @@ Waterfall: decide what happens to ONE drained queued message before it becomes a
 
 Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:309`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:311`](../../packages/core/agent/src/types.ts)
 
 #### `agent/queued` — emit
 
@@ -87,7 +87,7 @@ A message entered the agent's inbox (queued or steering). `source` is the resolv
 
 Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:246`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:248`](../../packages/core/agent/src/types.ts)
 
 #### `agent/request` — waterfall
 
@@ -99,7 +99,7 @@ Waterfall: mutate the fully-assembled GenerateOptions before the model call (hoo
 
 Types: [Agent](../core-data-structures/core.md) · [GenerateOptions](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:318`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:320`](../../packages/core/agent/src/types.ts)
 
 #### `agent/session-start` — emit
 
@@ -111,7 +111,7 @@ The agent's session lifecycle began, fired once before its first turn. `source`
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:259`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:261`](../../packages/core/agent/src/types.ts)
 
 #### `agent/status` — emit
 
@@ -123,7 +123,7 @@ Agent status changed (`idle` ⇄ `running`, or → `disposed`). Drive lifecycle
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:240`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:242`](../../packages/core/agent/src/types.ts)
 
 #### `agent/steering` — emit
 
@@ -135,7 +135,7 @@ Steering content was injected into a running turn.
 
 Types: [Agent](../core-data-structures/core.md) · [ContentBlock](../core-data-structures/core.md) · [MessageSource](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:346`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:348`](../../packages/core/agent/src/types.ts)
 
 #### `agent/step-result` — waterfall
 
@@ -147,7 +147,7 @@ Waterfall: post-process the assembled assistant Message before tool dispatch (va
 
 Types: [Agent](../core-data-structures/core.md) · [Message](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:324`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:326`](../../packages/core/agent/src/types.ts)
 
 #### `agent/stream-chunk` — emit
 
@@ -159,7 +159,7 @@ A raw StreamChunk arrived from the model (token-level UI/log feed).
 
 Types: [Agent](../core-data-structures/core.md) · [StreamChunk](../core-data-structures/llm-streaming.md)
 
-Source: [`packages/core/agent/src/types.ts:341`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:343`](../../packages/core/agent/src/types.ts)
 
 #### `agent/turn-continuation` — waterfall
 
@@ -171,7 +171,7 @@ Waterfall: override the turn-continuation decision via a typed ContinuationDecis
 
 Types: [Agent](../core-data-structures/core.md)
 
-Source: [`packages/core/agent/src/types.ts:334`](../../packages/core/agent/src/types.ts)
+Source: [`packages/core/agent/src/types.ts:336`](../../packages/core/agent/src/types.ts)
 
 ### `llm/*`