docs: rename docs/ -> serverAppConfigs-docs/ per system-wide PROJECTNAME-docs convention

All in-repo path references (AGENTS.md, README, old scripts, report artifacts,
test code paths) rewritten in the same commit; focused-test map extended for
.gitignore, old/scripts/*, dankclaw/comfyui/*, and report/* per this repo's
own convention ('add one before committing'). Obsidian wikilinks are
title-based and unaffected.

serverAppConfigs-docs/Dankserver/mariadb.md

@@ -0,0 +1,47 @@
+# MariaDB (RomM Backend)
+
+MariaDB 11 provides the database backend for RomM on Dankserver. RomM 5.2.0 requires MariaDB (or PostgreSQL) for its data store.
+
+**Host:** Dankserver — **Docs:** https://mariadb.com/kb/en/docker-mariadb-information/
+
+## Facts
+
+| Item | Value |
+|------|-------|
+| Image | `docker.io/mariadb:11` |
+| Port | 3306 (internal, within `appnet`) |
+| Database name | `romm` |
+| Data volume | `/opt/romm/mariadb` |
+
+## Docker Compose
+
+```yaml
+mariadb:
+  image: docker.io/mariadb:11
+  container_name: romm-mariadb
+  restart: unless-stopped
+  environment:
+    MARIADB_ROOT_PASSWORD: "${MARIADB_ROOT_PASSWORD}"
+    MARIADB_DATABASE: romm
+    MARIADB_USER: "${ROMM_DB_USER}"
+    MARIADB_PASSWORD: "${ROMM_DB_PASSWD}"
+  volumes:
+    - /opt/romm/mariadb:/var/lib/mysql
+  healthcheck:
+    test: ["CMD", "mariadb-admin", "ping", "-h", "localhost"]
+    interval: 10s
+    timeout: 5s
+    retries: 3
+```
+
+## Backup
+
+Back up the volume directory periodically:
+
+```bash
+sudo rsync -a /opt/romm/mariadb /mnt/backup/romm-mariadb/
+```
+
+## See Also
+
+- [[RomM]] — service that uses this database