* fix(cli): send User-Agent on jobnet and jobdanmark API requests
apiFetch/apiPost hit the portals' APIs without a User-Agent header, while every other Danish-portal CLI sends one on purpose (jobbank exports USER_AGENT and its tests assert it; jobindex sets it on htmlFetch). Requests without one are rejected by the portals' bot filters.
* fix(cli): satisfy strict typecheck in user-agent regression test
* refactor(cli): reframe user-agent tests as honest self-identification
* docs(changelog): entry for #283 user-agent self-identification
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
Oscar Madera