feat: add audit logs to document details page (#2379)

- Add collapsible audit logs section with paginated table
- Add View JSON button to inspect raw audit log entries
- Display legacy document ID and recipient roles
- Add admin TRPC endpoint for fetching audit logs
- Add database index on envelopeId for DocumentAuditLog table

<img width="887" height="724" alt="image"
src="https://github.com/user-attachments/assets/aeb904c9-515f-49e1-9f8f-513aef455678"
/>

packages/prisma/migrations/20260113022858_add_envelope_id_index_to_document_audit_log_table/migration.sql

@@ -0,0 +1,2 @@
+-- CreateIndex
+CREATE INDEX IF NOT EXISTS "DocumentAuditLog_envelopeId_idx" ON "DocumentAuditLog"("envelopeId");

packages/prisma/schema.prisma

@@ -472,6 +472,8 @@ model DocumentAuditLog {
   ipAddress String?
 
   envelope Envelope @relation(fields: [envelopeId], references: [id], onDelete: Cascade)
+
+  @@index([envelopeId])
 }
 
 enum DocumentDataType {