feat: homelab deployment - NPM + IONOS DNS + monitoring + NAS backup

- Restructured docker-compose for Nginx Proxy Manager (no custom nginx)
- Added domain wordly.art configuration
- Added Prometheus + Grafana monitoring stack with pre-configured dashboards
- Added PostgreSQL backup script to NAS (daily/weekly/monthly rotation)
- Added alert rules for backend, system, and Docker metrics
- Updated deployment guide for NPM + IONOS DNS homelab setup
- Added marketing plan document
- PDF translator and watermark support
- Enhanced middleware, routes, and translator modules

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

alembic/versions/006_fix_tier_check_constraint.py

@@ -0,0 +1,31 @@
+"""Fix tier CHECK constraint to allow all plan tiers
+
+Revision ID: 006
+Revises: cb71a958ad92
+"""
+from alembic import op
+
+revision = "006"
+down_revision = "a1b2c3d4e5f6"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.execute(
+        "ALTER TABLE users DROP CONSTRAINT IF EXISTS ck_users_tier"
+    )
+    op.execute(
+        "ALTER TABLE users ADD CONSTRAINT ck_users_tier "
+        "CHECK (tier IN ('free', 'starter', 'pro', 'business', 'enterprise'))"
+    )
+
+
+def downgrade() -> None:
+    op.execute(
+        "ALTER TABLE users DROP CONSTRAINT IF EXISTS ck_users_tier"
+    )
+    op.execute(
+        "ALTER TABLE users ADD CONSTRAINT ck_users_tier "
+        "CHECK (tier IN ('free', 'pro'))"
+    )