CSV Export/Import: Stopping Times (Haltezeit) below 1.0 minute are not imported correctly

### What is the input mode? Mouse ### What type of issue is it? Functionality ### What happened? When importing node base data via CSV, summed times below 1.0 minute are not imported correctly. If the total time (e.g. Passenger exchange time + Train dispatch time (ZAZ)) is less than 1.0 minute, the CSV import does not keep the actual value. Instead, the system imports a value of exactly 1 minute. This leads to incorrect node timing data after the import. <img width="1171" height="672" alt="Image" src="https://github.com/user-attachments/assets/b34079b3-ab99-4366-a8bb-ada46d4d8811" /> ### What did you expect to happen? - CSV import should preserve the exact time values from the CSV file - Times below 1.0 minute (e.g. 0.2, 0.5, 0.9 minutes) should be imported correctly - No automatic rounding or fallback to 1 minute should occur ### How can we reproduce it (as minimally and precisely as possible)? 1. Prepare a CSV file with node base data 2. Set Passenger exchange time + ZAZ so that the summed value is below 1.0 minute (e.g. 0.2 + 0.3 = 0.5) 3. Go to Base data → Import base data 4. Import the CSV file 5. Open the imported node and check the time values ### On which environments the bug occurs? Local ### On which browser the bug occurs? Firefox, Opera, Safari, Microsoft Edge, Google Chrome ### Netzgrafik-Editor version (top left corner `Version x.yy.zz`) 2.10.8