SEOUL, SOUTH KOREA — A prolonged period of uncertainty over the fate of impeached South Korean President Yoon Suk Yeol and a botched attempt to arrest him are giving oxygen to his backers and reviving support for his troubled party. Yoon, suspended from duties after his short-lived imposition of martial law on Dec. 3 and under criminal investigation for possible insurrection, has for weeks been holed up inside his hilltop residence in Seoul, guarded by a small army of personal security staff. In a National Barometer Survey poll released on Thursday, 59% of respondents wanted him arrested, something investigators are