Add messages support to runAgent for multi-turn bot conversations (#23395)

- Extend `runAgent` so callers can pass either a one-shot prompt or a
multi-turn messages array (user / assistant text), matching AI SDK’s XOR
shape — for Slack/Discord/Teams bots that need thread history.
- Enforce exactly one of prompt | messages in AgentRunService; map
messages 1:1 to AI SDK ModelMessages in AgentAsyncExecutorService
- Update shared types, GraphQL/SDK inputs, docs (skills-and-agents), and
regenerate metadata clients; existing prompt-only callers stay unchanged

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packages/twenty-docs/developers/extend/apps/logic/skills-and-agents.mdx

@@ -102,7 +102,8 @@ Schema notes:
 
 `runAgent()` lets a logic function run one of your app's agents (with its
 skills and tools). Identify the agent by the `universalIdentifier` you passed
-to `defineAgent()`:
+to `defineAgent()`. Pass either a `prompt` string or a `messages` conversation
+history — not both:
 
 ```ts src/logic-functions/run-enricher.ts
 import { runAgent } from 'twenty-sdk/logic-function';
@@ -113,7 +114,25 @@ const { result, error, success } = await runAgent({
 });
 ```
 
+For multi-turn bots (Slack, Discord, Teams, …), pass thread history as
+`messages` instead of a single `prompt`:
+
+```ts src/logic-functions/reply-in-thread.ts
+import { runAgent } from 'twenty-sdk/logic-function';
+
+const { result, error, success } = await runAgent({
+  agentUniversalIdentifier: 'b3c4d5e6-f7a8-9012-bcde-f34567890123',
+  messages: [
+    { role: 'user', content: 'Who owns Acme?' },
+    { role: 'assistant', content: 'Sarah owns the Acme account.' },
+    { role: 'user', content: 'What was the last touchpoint?' },
+  ],
+});
+```
+
 Key points:
+- Provide **exactly one** of `prompt` (string) or `messages` (1 to 100 entries
+  of `{ role: 'user' | 'assistant', content: string }`).
 - The agent runs **synchronously** and can read/update records itself via its
   own tools — `runAgent()` resolves once the run completes.
 - An app can only run its own agents.