VelantisWind 0.1.15

• Strong i18n cleanup across Spanish, English, French and German.
• Improved language switching behaviour in the hub.
• Cleaner ISO-aligned noise report for preliminary technical assessment.
• Better handling of imported OEM octave-band spectra.
• Clearer warnings for receiver coverage, meteorological inputs and preliminary-use limitations.
• Repository cleanup for release testing and GitHub publishing.