Summary: New product: OVEN PCHV3 frequency converters

Why It Matters: This shows a new product offering.

What Changed:

• Removed a news item about "Registrar RG10 back on sale!"
• Removed a news item about "New DTS125L.MG and DTS125M.MG sensors"
• Removed a news item about "MEG-K optical sensors series VB3"
• Removed a news item about "OwenCloud update from 01.07.25"
• Added a news item about "OVEN PCHV3 frequency converters with IP54 protection"
• Added a news item about "Price increase for SUNA-121 and SUNA-122 controllers"