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

TnR2

2025-10-01 528f92f7a2a26cade1c57ccf26b0ba6524e7cae5

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isang    1
dalawang    2
tatlong    3
apat na    4
limang    5
anim na    6
pitong    7
walong    8
siyam na    9