initial: split from gov-agreg — vreau.digital standalone platform

Moved from gov-agreg/src/pages/achizitii/* to root (drop prefix).
- 22 pages migrated, 127 files total
- All internal links: /achizitii/X → /X (176 occurrences fixed)
- AchizitiiLayout subnav rewritten: /X paths, top-right link to vreaudigital.ro hub
- BaseLayout new (vreau.digital branding, OG tags, site URL)
- astro.config.mjs: site https://vreau.digital, server output (was static)
- docker-compose: port 5096 (vreaudigital is 5095), container vreau-digital
- deploy.sh: paths /opt/vreau-digital, log /var/log/vreau-digital-deploy.log

Backend shared with gov-agreg:
- PostgreSQL satra (same schemas: seap, firms, anaf, anre, ...)
- Photon, Martin tiles
- Infisical /vreaudigital path (DATABASE_URL etc. shared)

build: PASS (npx astro check 0 errors, npm run build 5s vite + 10s server)

docker-compose.yml

@@ -0,0 +1,14 @@
+services:
+  vreau-digital:
+    build:
+      context: .
+      args:
+        BUILD_SHA: ${BUILD_SHA:-dev}
+        BUILD_REF: ${BUILD_REF:-local}
+        BUILD_TIME: ${BUILD_TIME:-}
+    container_name: vreau-digital
+    restart: unless-stopped
+    ports:
+      - "5096:4321"
+    env_file:
+      - .infisical-mi