Few wikimedians who understood the importance of wiki source project is giving proper
care to it. From Indic Wikis, I can show you the example of Bengali wikisource. According to me, both the wiktionary and wikisource projects
are very important for any language which has online presence.
For a language like Sanskrit (which is a classical language),wikisource is very much relevant and important projects. Perhaps it might have more number of source texts (which are in public domain) than most of the Indian languages.