Update dataset README (65 rows across hourly parts)

Update hourly manifest (65 total rows)

Append 65 rows to 2026-05-26T15 (65 in hour file)

Update dataset README (65 rows across hourly parts)

Update hourly manifest (65 total rows)

Append 65 rows to 2026-05-26T15 (65 in hour file)

Update dataset README (63 rows across hourly parts)

Update hourly manifest (63 total rows)

Append 63 rows to 2026-05-26T15 (63 in hour file)

initial commit