chore: prepare for public release

- add repository/homepage/bugs metadata; target Directus ^11
- genericize internal deployment references
- document install, compatibility, scheduling, security
- stop tracking internal .opencode work artifacts

dev/compose.staging.yml

@@ -6,7 +6,7 @@
 #
 # Keep ports/volumes/network distinct from the prod stack.
 
-name: land-nest-staging
+name: directus-staging
 
 services:
   db: