feat: import and export tickets as CSV

Every ticket of a project can be downloaded as CSV, and a CSV exported
from TaskStream or from Jira can be imported: types, statuses, priorities
and people are matched by id or name, the rest falls back with a warning,
and parents are rebuilt. The settings page previews an import before it
creates anything.

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

libs/api/tracker/domain/src/lib/factories/issue.factory.ts

@@ -18,6 +18,17 @@ export interface CreateIssueProps extends IssueDetails {
   type: string;
   reporterId: string;
   assigneeId?: string | null;
+  /** Imports only: an active status of the workflow to start in. */
+  status?: string | null;
+}
+
+/** The status asked for if it is active in the workflow, else the first one. */
+function startingStatus(
+  status: string | null | undefined,
+  workflow: ProjectWorkflow,
+): string {
+  const asked = status ? workflow.status(status) : undefined;
+  return asked && !asked.archived ? asked.id : workflow.initialStatus();
 }
 
 @Injectable()
@@ -51,7 +62,7 @@ export class IssueFactory {
       area: props.area ?? null,
       title,
       description: details.description ?? null,
-      status: workflow.initialStatus(),
+      status: startingStatus(props.status, workflow),
       priority: props.priority ?? IssuePriority.MEDIUM,
       reporterId: props.reporterId,
       assigneeId: props.assigneeId ?? null,