fix: make all scripts resolve paths relative to repo root

CloneVendorRepos.sh and CleanVendor.sh resolved vendor/ relative to scripts/
instead of the repo root, so vendor repos were cloned to the wrong location
(scripts/vendor) and docker-compose builds (which expect ./vendor at repo
root) would fail. BuildAll.sh and StatusCheck.sh had the same issue, cd-ing
to scripts/ instead of the repo root before running docker compose.

Also updated validate-all.sh with the 10 newer MCP servers that were added
after the script was last maintained (firefly-iii, actual, paperless, beszel,
gitea, grafana, ha, limesurvey, linkwarden, superset) plus added missing
env vars for audiobook-mcp and drawio-mcp.

scripts/BuildAll.sh

@@ -17,8 +17,8 @@ echo ""
 echo "Building all services..."
 echo ""
 
-# Change to project directory
-cd "$(dirname "${BASH_SOURCE[0]}")"
+# Change to project root (parent of scripts/)
+cd "$(dirname "${BASH_SOURCE[0]}")/.."
 
 # Get list of all services from docker-compose.yml
 SERVICES=$(docker compose config --services)