Added contract call idempotency and deduplication keys

corporate-platform/corporate-platform-backend/prisma/schema.prisma

@@ -1354,6 +1354,7 @@ model CreditTransfer {
 model ContractCall {
   id              String    @id @default(cuid())
   companyId       String
+  workflowId      String
   contractId      String
   methodName      String
   transactionHash String    @unique
@@ -1363,6 +1364,7 @@ model ContractCall {
   submittedAt     DateTime  @default(now())
   confirmedAt     DateTime?
 
+  @@unique([workflowId, contractId, methodName])
   @@index([companyId])
   @@index([contractId])
   @@index([status])

corporate-platform/corporate-platform-backend/src/stellar/soroban/contracts/contract.interface.ts

@@ -8,6 +8,7 @@ export type ContractAlias = 'carbonAsset' | 'retirementTracker';
 
 export interface ContractInvocation {
   companyId: string;
+  workflowId: string;
   contractId: string;
   methodName: string;
   args?: unknown[];
@@ -17,6 +18,7 @@ export interface ContractSimulation {
   contractId: string;
   methodName: string;
   args?: unknown[];
+  workflowId?: string;
 }
 
 export interface ContractExecutionResult {

corporate-platform/corporate-platform-backend/src/stellar/soroban/dto/contract-call.dto.ts

@@ -1,6 +1,10 @@
-import { IsArray, IsIn, IsOptional, IsString } from 'class-validator';
+import { IsArray, IsIn, IsNotEmpty, IsOptional, IsString } from 'class-validator';
 
 export class ContractCallDto {
+  @IsNotEmpty()
+  @IsString()
+  workflowId: string;
+
   @IsOptional()
   @IsString()
   contractId?: string;