fix(portals): add a 15s request timeout to every board fetch (#197)

None of the board CLIs set a fetch timeout, and the retry loops react only to HTTP status codes, not to a connection that is accepted then never responds (black-holed TCP, hung TLS, stalled proxy) - so await fetch(...) never settles and the command hangs with no output and no exit. freehire's helper even documented a fast-degrade contract its try/catch didn't deliver on a mid-flight stall. Adds signal: AbortSignal.timeout(15000) to every fetch across all six CLIs, with network-free tests asserting the signal is present on each request wrapper.

By @thejesh23. Verified: 8 timeout tests pass locally with fetch stubbed (no network), and would fail on the pre-fix code.

Closes #196

.agents/skills/jobdanmark-search/cli/src/commands/detail.ts

@@ -217,6 +217,7 @@ export const detail = defineCommand({
           "Accept": "text/html,application/xhtml+xml",
           "User-Agent": "Mozilla/5.0",
         },
+        signal: AbortSignal.timeout(15000),
       })
 
       if (response.status === 404) {