Let server route resolvers answer the caller synchronously (#23233)

## Problem

A server route resolver can only return a dispatch target (`{
workspaceId, targetLogicFunctionUniversalIdentifier, payload }`), and
`ServerRouteTriggerService` always acks `202 {queued:true}`. The target
function runs off the queue, after the response has been sent, so its
return value can never reach the caller.

That makes it impossible to integrate a provider whose webhook URL has
to be proven with a handshake on the same response. Slack's Events API
is the case that surfaced it: `url_verification` sends `{ type,
challenge }` and will not accept the Request URL unless the challenge
comes back on that POST.

## Change

A resolver may now return a `Response` (the existing
`LogicFunctionHttpResponse`) instead of a dispatch target. The route
sends it as-is via `buildRouteTriggerResponse` and enqueues nothing.

- Reuses the marker and builder that HTTP route triggers already use, so
there is no new response shape.
- Dispatch results behave exactly as before; the resolver error path is
unchanged, just hoisted out of `parseResolverResult` so it runs before
the branch.
- SDK: `ServerRouteResolverResult` becomes `ServerRouteDispatchResult |
LogicFunctionHttpResponse`.

Additive: a resolver that returns a dispatch target sees no behavior
change. Previously, returning this shape threw
`RESOLVER_INVALID_RESULT`.

## Testing

`server-route-trigger.service.spec.ts` gains a case asserting the
resolver's response is sent verbatim and nothing is enqueued. 15/15
pass.

## Context

Split out of #22984 (Slack conversational assistant), which needs this
to complete the Slack Events URL verification. That PR depends on this
one merging first.

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packages/twenty-sdk/src/sdk/define/index.ts

@@ -92,7 +92,9 @@ export type {
 export type {
   LogicFunctionConfig,
   LogicFunctionHandler,
+  ServerRouteResolverResult,
 } from '@/sdk/define/logic-functions/logic-function-config';
+export type { ServerRouteDispatchResult } from 'twenty-shared/application';
 export type { CronPayload } from '@/sdk/define/logic-functions/triggers/cron-payload-type';
 export type {
   DatabaseEventPayload,

packages/twenty-sdk/src/sdk/define/logic-functions/logic-function-config.ts

@@ -1,21 +1,19 @@
 import {
   type LogicFunctionManifest,
+  type ServerRouteDispatchResult,
   type ServerRouteTriggerSettings,
 } from 'twenty-shared/application';
+import { type LogicFunctionHttpResponse } from 'twenty-shared/types';
 
 export type LogicFunctionHandler = (...args: any[]) => any | Promise<any>;
 
-// A resolver function attached to `serverRouteTriggerSettings` runs in the
-// owner workspace and must return BOTH the target workspace and the target
-// logic function to dispatch to. The server contract is
-// `{ workspaceId: string; targetLogicFunctionUniversalIdentifier: string;
-// payload?: object }`. The resolver is the single point of authorization —
-// the URL only carries the resolver's universalIdentifier.
-export type ServerRouteResolverResult = {
-  workspaceId: string;
-  targetLogicFunctionUniversalIdentifier: string;
-  payload?: object;
-};
+// A resolver attached to `serverRouteTriggerSettings` runs in the owner workspace and is the single
+// point of authorization: the URL only carries the resolver's universalIdentifier. Returning a
+// dispatch result enqueues the target, returning a `Response` answers the caller synchronously
+// instead, for providers whose webhook URL requires a handshake reply.
+export type ServerRouteResolverResult =
+  | ServerRouteDispatchResult
+  | LogicFunctionHttpResponse;
 
 export type ServerRouteResolverHandler = (
   ...args: any[]

packages/twenty-sdk/src/sdk/logic-function/index.ts

@@ -13,7 +13,9 @@
 export type {
   LogicFunctionConfig,
   LogicFunctionHandler,
+  ServerRouteResolverResult,
 } from '@/sdk/define/logic-functions/logic-function-config';
+export type { ServerRouteDispatchResult } from 'twenty-shared/application';
 
 export type {
   InstallHandler,