feat: work-in-progress limits and swimlanes on the board

Each status can carry a WIP limit in the project settings; the board shows
it next to the count, marks a column that goes over it and says so when a
card is dropped there. The board can also be grouped in rows by person,
epic, priority or type, remembered per browser.

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

apps/mcp/src/app/api/taskstream.schema.ts

@@ -1160,6 +1160,8 @@ export interface components {
             requiresReason: boolean;
             /** @description No new tickets or transitions into it */
             archived: boolean;
+            /** @description Work-in-progress limit (a warning, not a lock) */
+            wipLimit: number | null;
         };
         StatusTransitionsDto: {
             /** @example IN_QA */
@@ -1270,6 +1272,8 @@ export interface components {
             requiresReason: boolean;
             /** @default false */
             archived: boolean;
+            /** @description Work-in-progress limit (null: none) */
+            wipLimit?: number | null;
         };
         StatusTransitionsBodyDto: {
             /** @example IN_QA */