Added transcription of audio and video files to local data sources (#1081)

Co-authored-by: Paul Koudelka <106623909+PaulKoudelka@users.noreply.github.com>

app/MindWork AI Studio/wwwroot/changelog/v26.10.1.md

@@ -10,6 +10,7 @@
 - Added Requesty as a new LLM provider for chats, embeddings, and transcriptions. Requesty is an AI gateway from the United Kingdom that gives you models from many providers with a single API key. Because where your data is processed depends on the model you choose, you set its trust level yourself. Thanks, Thibault Jaigu (`Thibaultjaigu`), for this first contribution.
 - Added [llmman](https://github.com/llmmanorg/llmman) as a new option for the models you host yourself. llmman runs open models on your own computer or server, and AI Studio can use them for chats, embeddings, and transcriptions. Thanks, Eric Curtin (`ericcurtin`), for this first contribution.
 - Added support for Mistral Large 4.
+- Added transcription of audio and video files in local data sources. When you select such files, for example with the pattern `*.mp3` or `*`, AI Studio sends them to your transcription provider and adds the transcripts to the index. It keeps each transcript, so an unchanged recording is transcribed only once. Thanks, Paul Koudelka (`PaulKoudelka`), for this contribution.
 - Added backups of all your data. Under Data Backup & Restore, on the information page and in the settings, you save your chats, settings, plugins, and the index of your data sources into a single file, for example, to take everything to a new computer. Restoring such a backup replaces your data when AI Studio restarts, or you add only its chats to the ones you have. API keys and passwords never go into a backup, and after a restore, AI Studio tells you where to enter them again. Thanks, Jens Erler (`j-erler`), for this contribution.
 - Added organization-wide management for backups. IT departments can prevent users from backing up their data or from restoring a backup. A backup leaves out what the configurations of your organization bring along, such as their providers and plugins, so nothing appears twice after a restore.
 - Added an overview of the data folders of AI Studio to the information page, for when you back up your computer with a tool of your own. It shows where the folders are and which of their contents belong into a backup. AI Studio now stores the locations of its own files, such as transcripts, relative to its data folder, so such a copy also works on a computer with another user name.