feat: serve plugin http and websockets from one mount instead of ports

plugins/workspaces/src/backend/index.ts

@@ -2,8 +2,8 @@ import type { PluginContext } from "@termix/plugin-sdk/backend";
 import { startWorkspacesService, stopWorkspacesService } from "./routes.js";
 
 export async function activate(ctx: PluginContext) {
-  startWorkspacesService();
-  ctx.log.info("Workspaces router registered at /workspaces");
+  startWorkspacesService(ctx.http.router());
+  ctx.log.info("Workspaces routes mounted at /plugin-api/workspaces");
 }
 
 export async function deactivate() {

plugins/workspaces/src/backend/routes.ts

@@ -1,13 +1,9 @@
 import type { AuthenticatedRequest } from "../../../../src/types/index.js";
-import express, { type Request, type Response } from "express";
+import express, { type Request, type Response, type Router } from "express";
 import { databaseLogger } from "../../../../src/backend/utils/logger.js";
 import { AuthManager } from "../../../../src/backend/utils/auth-manager.js";
 import { createCurrentWorkspaceRepository } from "../../../../src/backend/database/repositories/factory.js";
 import type { WorkspaceRecord } from "../../../../src/backend/database/repositories/workspace-repository.js";
-import {
-  registerWorkspacesRouter,
-  unregisterWorkspacesRouter,
-} from "../../../../src/backend/database/routes/workspace-dispatch.js";
 
 export const router = express.Router();
 
@@ -639,10 +635,10 @@ router.delete(
   },
 );
 
-export function startWorkspacesService(): void {
-  registerWorkspacesRouter(router);
+export function startWorkspacesService(mountOn: Router): void {
+  mountOn.use(router);
 }
 
 export function stopWorkspacesService(): void {
-  unregisterWorkspacesRouter();
+  // Unmounted by the runtime when the plugin deactivates.
 }