Add document filters to MCP and n8n APIs

Align MCP and n8n document listing endpoints with the GraphQL console
API so every document filter is available across all three interfaces.

MCP:
- listDocuments: add status filter, default to ACTIVE
- listDocumentVersions: add statuses filter
- DocumentOrderField: add UPDATED_AT

n8n:
- document getAll: add query, documentTypes, classifications, status filters (default ACTIVE)
- document getAllVersions: add statuses filter
- document getAllSignatures: add states and activeContract filters

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

packages/n8n-node/nodes/Probo/actions/document/getAllSignatures.operation.ts

@@ -60,6 +60,39 @@ export const description: INodeProperties[] = [
 		default: 50,
 		description: 'Max number of results to return',
 	},
+	{
+		displayName: 'Filters',
+		name: 'filters',
+		type: 'collection',
+		placeholder: 'Add Filter',
+		default: {},
+		displayOptions: {
+			show: {
+				resource: ['document'],
+				operation: ['getAllSignatures'],
+			},
+		},
+		options: [
+			{
+				displayName: 'States',
+				name: 'states',
+				type: 'multiOptions',
+				default: [],
+				description: 'Filter by signature state',
+				options: [
+					{ name: 'Requested', value: 'REQUESTED' },
+					{ name: 'Signed', value: 'SIGNED' },
+				],
+			},
+			{
+				displayName: 'Active Contract',
+				name: 'activeContract',
+				type: 'boolean',
+				default: false,
+				description: 'Whether to filter by active contract status',
+			},
+		],
+	},
 ];
 
 export async function execute(
@@ -69,12 +102,19 @@ export async function execute(
 	const documentVersionId = this.getNodeParameter('documentVersionId', itemIndex) as string;
 	const returnAll = this.getNodeParameter('returnAll', itemIndex) as boolean;
 	const limit = this.getNodeParameter('limit', itemIndex, 50) as number;
+	const filters = this.getNodeParameter('filters', itemIndex, {}) as IDataObject;
+
+	const filter: IDataObject = {};
+	if ((filters.states as string[])?.length) filter.states = filters.states;
+	if (filters.activeContract !== undefined) filter.activeContract = filters.activeContract;
+
+	const hasFilter = Object.keys(filter).length > 0;
 
 	const query = `
-		query GetDocumentVersionSignatures($documentVersionId: ID!, $first: Int, $after: CursorKey) {
+		query GetDocumentVersionSignatures($documentVersionId: ID!, $first: Int, $after: CursorKey${hasFilter ? ', $filter: DocumentVersionSignatureFilter' : ''}) {
 			node(id: $documentVersionId) {
 				... on DocumentVersion {
-					signatures(first: $first, after: $after) {
+					signatures(first: $first, after: $after${hasFilter ? ', filter: $filter' : ''}) {
 						edges {
 							node {
 								id
@@ -100,10 +140,13 @@ export async function execute(
 		}
 	`;
 
+	const variables: IDataObject = { documentVersionId };
+	if (hasFilter) variables.filter = filter;
+
 	const signatures = await proboApiRequestAllItems.call(
 		this,
 		query,
-		{ documentVersionId },
+		variables,
 		(response) => {
 			const data = response?.data as IDataObject | undefined;
 			const node = data?.node as IDataObject | undefined;