Merge pull request #103 from Hans5958/clarifications/album-source-required

Clarify "Album source required" rule

Author: Shiroizu

src/content/rules/album-source-required.mdx

@@ -18,6 +18,13 @@ rule_context: Content policy
 mikumod_support: "True"
 automatically_fixed: "False"
 complete_validation: "True"
+excerpt: Include a PV link, external link or description as a source for the album.
 ---
 
-Include a PV link, external link or description.
+When adding an album, include a verifiable source or reference confirming the existence of the album. This includes, but not limited to:
+
+- The link to the album on streaming services (YouTube, Spotify, Apple Music, Bandcamp, etc.)
+- The link to the album store page (Amazon, iTunes, Booth, Bandcamp, etc.)
+- The link to the album on the artist's website, blog, or social media profiles
+- The crossfade/full album stream on the artist's channels (added on the "Media" tab; as a PV)
+- A description that includes relevant, verifiable information