Fix multimed speakers: filter >2 speakers, assign Arzt/Patient by order

Add 50 MultiMed German clips (111 segments)

Deduplicate: 28 -> 16 unique clips

Fix: embed lung-doctor audio bytes + restore 12 old clips (16 total)

Restore 12 old clips + add 4 lung-doctor clips (16 total)

Add 4 lung-doctor clip(s)

Expand entities from JSON string to typed list of structs

Reformat segments from JSON string to typed list of structs

Reformat: one row per clip with segments list

Upload dataset (part 00001-of-00002)

Upload dataset (part 00000-of-00002)