chore(oss): audit root config, compose, scripts, and catalog tests

Replace the 182-line inline schema in docker-compose.yml with a runner
over packages/server/migrations, add 004 restoring the constraints and
64-bit counters the inline SQL carried, skip migrations already recorded
in schema_versions, relabel the mount for SELinux, and drop the obsolete
compose version key. Retarget the catalog contract test at the migration
files.

Claude-Session: https://claude.ai/code/session_01Agoc9bRVE9KL7mmWtey9Vq

scripts/install.sh

@@ -2,7 +2,7 @@
 set -e
 
 # ───────────────────────────────────────────────────────────
-#  Elydora Open Source — One-click deployment
+#  Elydora Open Source installer
 # ───────────────────────────────────────────────────────────
 
 printf '\n'
@@ -50,7 +50,7 @@ ok "All prerequisites satisfied."
 cd "$(dirname "$0")/.."
 
 if [ -f .env ]; then
-  info "Existing .env found — skipping secret generation."
+  info "Existing .env found; skipping secret generation."
 else
   info "Generating .env from .env.example..."