fix: handle empty strings after event removal in transcription processing (...

TnR2

2025-10-01 528f92f7a2a26cade1c57ccf26b0ba6524e7cae5

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diez    10
once    11
doce    12
trece    13
catorce    14
quince    15
dieciséis    16
diecisiete    17
dieciocho    18
diecinueve    19