feat: custom fields per project

Text, number, date or option-list fields defined in the project settings
(archived, never removed; their type is fixed once saved). Tickets hold
them, edited in the side panel, listed under the title and filtered by
option in the list view; also over GraphQL, REST (?field=ID:value) and MCP.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/api/tracker/application/src/lib/event-handlers/activity-summary.ts

@@ -90,6 +90,7 @@ const FIELD: Record<string, string> = {
   storyPoints: 'los puntos',
   startDate: 'la fecha de inicio',
   dueDate: 'la fecha límite',
+  customFields: 'los campos personalizados',
 };
 
 const list = (items: string[]) =>

libs/api/tracker/application/src/lib/event-handlers/issue-created.event-handler.ts

@@ -57,6 +57,7 @@ export class IssueCreatedEventHandler
       storyPoints: issue.storyPoints,
       startDate: issue.startDate ?? null,
       dueDate: issue.dueDate,
+      customFields: issue.customFields ?? {},
       createdAt: issue.createdAt,
       updatedAt: issue.updatedAt,
       version: versionOf(event),

libs/api/tracker/application/src/lib/issues.service.ts

@@ -355,6 +355,7 @@ export class IssuesService {
       storyPoints: issue.storyPoints,
       startDate: issue.startDate,
       dueDate: issue.dueDate,
+      customFields: issue.customFields,
       parentId: issue.parentId,
       // The original's text is the content, not the type's template.
       useTemplate: false,

libs/api/tracker/application/src/lib/ports/find-issues.repository.ts

@@ -33,6 +33,8 @@ export interface IssueFilter {
   dueTo?: string;
   /** Only tickets in no sprint (wins over `sprintId`). */
   noSprint?: boolean;
+  /** Custom field id → the value it must hold. */
+  customFields?: Record<string, string>;
   /** Only the ones the viewer follows (the query handler turns it into `watcherId`). */
   watching?: boolean;
   /** Only the ones this person follows. */