fix(fireflies): guard against NaN timestamp, use stricter V2 detection

Address PR review feedback:
- Use Number.isFinite guard to prevent NaN timestamp propagation
- Use AND instead of OR for V2 detection since both meeting_id and
  event are required fields in every V2 payload

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: waleedlatif1

apps/sim/lib/webhooks/providers/fireflies.ts

@@ -46,13 +46,15 @@ export const firefliesHandler: WebhookProviderHandler = {
   async formatInput({ body }: FormatInputContext): Promise<FormatInputResult> {
     const b = body as Record<string, unknown>
 
-    // Fireflies V2 webhooks use snake_case field names and "event" instead of "eventType"
-    const isV2 = typeof b.meeting_id === 'string' || typeof b.event === 'string'
+    // Fireflies V2 webhooks use snake_case field names and "event" instead of "eventType".
+    // Both meeting_id and event are required in every V2 payload, so AND is the correct check.
+    const isV2 = typeof b.meeting_id === 'string' && typeof b.event === 'string'
 
     const meetingId = ((isV2 ? b.meeting_id : b.meetingId) || '') as string
     const eventType = ((isV2 ? b.event : b.eventType) || 'Transcription completed') as string
     const clientReferenceId = ((isV2 ? b.client_reference_id : b.clientReferenceId) || '') as string
-    const timestamp = b.timestamp ? Number(b.timestamp) : null
+    const rawTimestamp = b.timestamp != null ? Number(b.timestamp) : null
+    const timestamp = rawTimestamp !== null && Number.isFinite(rawTimestamp) ? rawTimestamp : null
 
     return {
       input: {