Live observation: sweep on "Базовый переулок, 52" produced area_m2=2_025_106.7
(concatenated digits across DOM boundaries) -> psycopg.NumericValueOutOfRange on
INSERT, lost entire batch of 30 items from page=1.
Cap at 10_000 m2 (residential ceiling) and drop <=0. Keeps the rest of the
item (price, dates, status) so the row still persists with area_m2=NULL --
better than losing the whole batch.
