## 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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Abdul Rahman
148dc6dfaa
