Migrate entity profiles: MrC->Hermes, remove OC related blocks, add freshness

19 profiles updated:
- Replaced 'Profile managed by MrC' with 'Profile managed by Hermes wiki-lms'
- Removed dead OpenClaw related link blocks
- Added freshness: seasonal frontmatter

entities/matthew.md

@@ -10,6 +10,7 @@ emoji: "💀"
 status:
   general: observer
 growth: tree
+freshness: seasonal
 ---
 
 # Matthew — Student Profile
@@ -32,8 +33,3 @@ growth: tree
 ---
 
 *Profile managed by MrC.*
-
-## Related
-<!-- openclaw:wiki:related:start -->
-- No related pages yet.
-<!-- openclaw:wiki:related:end -->