✨ Add support for PostgresDB and save date as Date

packages/cli/src/databases/sqlite/CredentialsEntity.ts

@@ -37,8 +37,8 @@ export class CredentialsEntity implements ICredentialsDb {
 	nodesAccess: ICredentialNodeAccess[];
 
 	@Column()
-	createdAt: number;
+	createdAt: Date;
 
 	@Column()
-	updatedAt: number;
+	updatedAt: Date;
 }

packages/cli/src/databases/sqlite/ExecutionEntity.ts

@@ -39,10 +39,10 @@ export class ExecutionEntity implements IExecutionFlattedDb {
 	retrySuccessId: string;
 
 	@Column()
-	startedAt: number;
+	startedAt: Date;
 
 	@Column()
-	stoppedAt: number;
+	stoppedAt: Date;
 
 	@Column('simple-json')
 	workflowData: IWorkflowDb;

packages/cli/src/databases/sqlite/WorkflowEntity.ts

@@ -36,10 +36,10 @@ export class WorkflowEntity implements IWorkflowDb {
 	connections: IConnections;
 
 	@Column()
-	createdAt: number;
+	createdAt: Date;
 
 	@Column()
-	updatedAt: number;
+	updatedAt: Date;
 
 	@Column({
 		type: 'simple-json',