fix(data-drains): preserve explicit forcePathStyle=false + reserve x-sim-signature

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: waleedlatif1

apps/sim/ee/data-drains/destinations/registry.tsx

@@ -102,7 +102,7 @@ const s3FormSpec: DestinationFormSpec<S3State> = {
       region: s.region,
       prefix: s.prefix || undefined,
       endpoint: s.endpoint || undefined,
-      forcePathStyle: s.forcePathStyle || undefined,
+      forcePathStyle: s.forcePathStyle,
     },
     destinationCredentials: {
       accessKeyId: s.accessKeyId,

apps/sim/lib/data-drains/destinations/webhook.ts

@@ -33,6 +33,7 @@ const RESERVED_SIGNATURE_HEADER_NAMES = new Set([
   'x-sim-sequence',
   'x-sim-row-count',
   'x-sim-probe',
+  'x-sim-signature',
 ])
 
 /**