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

TnR2

2025-10-01 528f92f7a2a26cade1c57ccf26b0ba6524e7cae5

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one    12
two    1
three    2
four    3
five    4
six    5
seven    6
eigh    7
nine    8
ten    9
eleven    10
twelve    11