recipe-maintainer: public snapshot (secrets + deployment plans removed, single commit)

Sanitized single-commit public mirror of recipe-maintainer.
- Removed test-ssh/.testenv (live creds); added test-ssh/.testenv.example placeholders.
- Removed plans/ and planned-updates/ (deployment-planning docs) so no client/
  deployment domains appear in the public repo.
- All other secret stores were already gitignored.
- docs.coopcloud.tech retained as a submodule (public upstream).

recipe-info/bluesky-pds/upstream.md

@@ -0,0 +1,13 @@
+# Bluesky PDS Upstream
+
+## Main Project
+
+- **Repository:** https://github.com/bluesky-social/pds
+- **Releases:** https://github.com/bluesky-social/pds/releases
+- **AT Protocol Docs:** https://atproto.com
+
+## Images
+
+| Service | Image | Release Notes |
+|---------|-------|---------------|
+| app | `ghcr.io/bluesky-social/pds` | https://github.com/bluesky-social/pds/releases |