feat: add Asciinema terminal recording server stack

Added new asciinema stack for self-hosted terminal recording and sharing
platform with custom "Pivoine" theme inspired by pivoine.art aesthetic.

New Services:
- **asciinema**: Terminal recording server at asciinema.pivoine.art
  - PostgreSQL backend for recording persistence
  - Email authentication via IONOS SMTP magic links
  - Public/private recording visibility controls
  - Embed recordings on any website
  - Custom rose/magenta themed UI

Custom Theme (asciinema/theme/custom.css):
- Primary color: RGB(206, 39, 91) - Deep rose/magenta
- Dark charcoal backgrounds: HSL(0, 0%, 17.5%)
- High contrast design with bold color accents
- Styled components: navigation, cards, forms, buttons, terminal player
- Smooth animations and hover effects
- Responsive design with mobile breakpoints
- Custom scrollbars, selection colors, loading states

Infrastructure Updates:
- PostgreSQL: Added `asciinema` database to init script
- arty.yml: Added ASCIINEMA_* environment variables
- compose.yaml: Included asciinema stack in root composition
- CLAUDE.md: Comprehensive documentation with CLI setup guide
- Backup: Added asciinema-backup plan (11 AM daily, 7d/4w/6m/2y retention)

Configuration:
- URL: https://asciinema.pivoine.art
- Database: PostgreSQL `asciinema` database
- SMTP: Email auth via IONOS SMTP
- Unclaimed TTL: 30 days (auto-cleanup)
- Secret: Generated 64-char hex key in .env

Features:
- Record terminal sessions with asciinema CLI
- Web player with play/pause controls and speed adjustment
- User profiles with personal recording collections
- Embed recordings via iframe or direct links
- Privacy controls (public/private recordings)
- Automatic cleanup of unclaimed recordings

Integration Points:
- Documentation: Embed terminal demos
- Blog posts: Share command-line tutorials
- GitHub: Link recordings in README files
- Tutorials: Interactive terminal walkthroughs

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

core/postgres/init/01-init-databases.sh

@@ -37,6 +37,10 @@ psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-E
     SELECT 'CREATE DATABASE tandoor'
     WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = 'tandoor')\gexec
 
+    -- Asciinema terminal recording server database
+    SELECT 'CREATE DATABASE asciinema'
+    WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = 'asciinema')\gexec
+
     -- Grant privileges to all databases
     GRANT ALL PRIVILEGES ON DATABASE directus TO $POSTGRES_USER;
     GRANT ALL PRIVILEGES ON DATABASE umami TO $POSTGRES_USER;
@@ -45,11 +49,12 @@ psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-E
     GRANT ALL PRIVILEGES ON DATABASE joplin TO $POSTGRES_USER;
     GRANT ALL PRIVILEGES ON DATABASE mattermost TO $POSTGRES_USER;
     GRANT ALL PRIVILEGES ON DATABASE tandoor TO $POSTGRES_USER;
+    GRANT ALL PRIVILEGES ON DATABASE asciinema TO $POSTGRES_USER;
 
     -- Log success
     SELECT 'Compose databases initialized:' AS status;
     SELECT datname FROM pg_database
-    WHERE datname IN ('directus', 'umami', 'n8n', 'linkwarden', 'joplin', 'mattermost', 'tandoor')
+    WHERE datname IN ('directus', 'umami', 'n8n', 'linkwarden', 'joplin', 'mattermost', 'tandoor', 'asciinema')
     ORDER BY datname;
 EOSQL
 
@@ -65,4 +70,5 @@ echo "  • linkwarden   - Bookmark manager database"
 echo "  • joplin       - Note-taking server database"
 echo "  • mattermost   - Chat platform database"
 echo "  • tandoor      - Recipe manager database"
+echo "  • asciinema    - Terminal recording server database"
 echo ""