docs(ci): DE-only docs cleanup; add CI Docs + validators; manualize deploy workflow; consolidate PR template; add .gitignore (MP-7)

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,13 +0,0 @@
-### Summary
-Describe the purpose of this PR.
-
-### Checklist
-- [ ] Docs updated (affected pages in docs/ adjusted or created)
-- [ ] Links checked (internal links valid; external links optionally via lychee)
-- [ ] Frontmatter present on new/updated pages (owner, status, last_reviewed, review_cycle)
-
-### Validation
-- [ ] Ran scripts/validation/validate-docs.sh locally (optional)
-
-### Related
-Link related issues/PRs/ADRs.

.github/pull_request_template.md

@@ -6,7 +6,7 @@ Kurze Beschreibung des Ziels/Problems und was dieser PR löst.
 
 ## Prüfliste (Definition of Done)
 - [ ] CI grün (Backend/Docs)
-- [ ] Doku-Front‑Matter vorhanden und valide (`modul`, `status`, `summary`, optional `last_reviewed`, `review_cycle`, `yt_epic/yt_issues`)
+- [x] Doku-Front‑Matter vorhanden und valide (`modul`, `status`, `summary`, optional `last_reviewed`, `review_cycle`, `yt_epic/yt_issues`)
 - [ ] Links geprüft (CI Link‑Checker läuft grün)
 - [ ] Falls relevant: YouTrack‑Key im PR‑Titel/Commit enthalten (z. B. MP-7)
 - [ ] Bei Architekturänderung: ADR aktualisiert und verlinkt

.github/workflows/deploy-proxmox.yml

@@ -3,13 +3,9 @@
 # Meldestelle Project - CI/CD Pipeline
 # ===================================================================
 
-name: Deploy to Proxmox Server
+name: Deploy Proxmox (manual)
 
 on:
-  push:
-    branches: [main, develop]
-  pull_request:
-    branches: [main]
   workflow_dispatch: # Manueller Trigger
 
 env: