Add parse_udot_ibi_page + scrape_udot_ibi for the UDOT IBI 511 traffic
camera feed (prod-ut.ibi511.com, no key). DataTables endpoint is POST
form-encoded and caps at 100 rows/page regardless of `length`; page walk
uses recordsTotal with a UDOT_IBI_MAX_PAGES (default 40) runaway cap.
Skip images[0].blocked/disabled, parse WKT POINT(lng lat) from
latLng.geography.wellKnownText, drop outside the Utah bbox
(lat 36.9-42.1, lon -114.2--108.9). discovery_source=udot, stable
source_url == snapshot_url == /map/Cctv/{id} (never scrape frames),
url_hash dedupe, OSINT_USER_AGENT + X-Requested-With header.
Unit tests: WKT lng/lat order, blocked/disabled skip, bbox drop,
malformed payload, missing WKT.