feat(#swarm): Add Docker Swarm deployment with AI provider configuration

- Add setup-wizard.sh for interactive configuration
- Add docker-compose.swarm.yml optimized for swarm deployment
- Make CLAUDE_API_KEY optional based on AI_PROVIDER setting
- Support multiple AI providers: Ollama, Claude API, OpenAI
- Add BETTER_AUTH_SECRET to .env.example
- Update deploy-swarm.sh to validate AI provider config
- Add comprehensive documentation (DOCKER-SWARM.md, SWARM-QUICKREF.md)

Changes:
- AI_PROVIDER env var controls which AI backend to use
- Ollama is default (no API key required)
- Claude API and OpenAI require respective API keys
- Deployment script validates based on selected provider
- Removed Authentik services from swarm compose (using external)
- Configured for upstream Traefik integration

.env.swarm.example

@@ -0,0 +1,147 @@
+# ==============================================
+# Mosaic Stack - Docker Swarm Configuration
+# ==============================================
+# Copy this file to .env for Docker Swarm deployment
+
+# ======================
+# Application Ports (Internal)
+# ======================
+API_PORT=3001
+API_HOST=0.0.0.0
+WEB_PORT=3000
+
+# ======================
+# Domain Configuration (Traefik)
+# ======================
+# These domains must be configured in your DNS or /etc/hosts
+MOSAIC_API_DOMAIN=api.mosaicstack.dev
+MOSAIC_WEB_DOMAIN=mosaic.mosaicstack.dev
+MOSAIC_AUTH_DOMAIN=auth.mosaicstack.dev
+
+# ======================
+# Web Configuration
+# ======================
+# Use the Traefik domain for the API URL
+NEXT_PUBLIC_APP_URL=http://mosaic.mosaicstack.dev
+NEXT_PUBLIC_API_URL=http://api.mosaicstack.dev
+
+# ======================
+# PostgreSQL Database
+# ======================
+DATABASE_URL=postgresql://mosaic:REPLACE_WITH_SECURE_PASSWORD@postgres:5432/mosaic
+POSTGRES_USER=mosaic
+POSTGRES_PASSWORD=REPLACE_WITH_SECURE_PASSWORD
+POSTGRES_DB=mosaic
+POSTGRES_PORT=5432
+
+# PostgreSQL Performance Tuning
+POSTGRES_SHARED_BUFFERS=256MB
+POSTGRES_EFFECTIVE_CACHE_SIZE=1GB
+POSTGRES_MAX_CONNECTIONS=100
+
+# ======================
+# Valkey Cache
+# ======================
+VALKEY_URL=redis://valkey:6379
+VALKEY_HOST=valkey
+VALKEY_PORT=6379
+VALKEY_MAXMEMORY=256mb
+
+# Knowledge Module Cache Configuration
+KNOWLEDGE_CACHE_ENABLED=true
+KNOWLEDGE_CACHE_TTL=300
+
+# ======================
+# Authentication (Authentik OIDC)
+# ======================
+OIDC_ENABLED=true
+OIDC_ISSUER=http://auth.mosaicstack.dev/application/o/mosaic-stack/
+OIDC_CLIENT_ID=your-client-id-here
+OIDC_CLIENT_SECRET=your-client-secret-here
+OIDC_REDIRECT_URI=http://api.mosaicstack.dev/auth/callback/authentik
+
+# Authentik PostgreSQL Database
+AUTHENTIK_POSTGRES_USER=authentik
+AUTHENTIK_POSTGRES_PASSWORD=REPLACE_WITH_SECURE_PASSWORD
+AUTHENTIK_POSTGRES_DB=authentik
+
+# Authentik Configuration
+AUTHENTIK_SECRET_KEY=REPLACE_WITH_RANDOM_SECRET_MINIMUM_50_CHARS
+AUTHENTIK_ERROR_REPORTING=false
+AUTHENTIK_BOOTSTRAP_PASSWORD=REPLACE_WITH_SECURE_PASSWORD
+AUTHENTIK_BOOTSTRAP_EMAIL=admin@mosaicstack.dev
+AUTHENTIK_COOKIE_DOMAIN=.mosaicstack.dev
+
+# ======================
+# JWT Configuration
+# ======================
+JWT_SECRET=REPLACE_WITH_RANDOM_SECRET_MINIMUM_32_CHARS
+JWT_EXPIRATION=24h
+
+# ======================
+# Encryption (Credential Security)
+# ======================
+# Generate with: openssl rand -hex 32
+ENCRYPTION_KEY=REPLACE_WITH_64_CHAR_HEX_STRING_GENERATE_WITH_OPENSSL_RAND_HEX_32
+
+# ======================
+# OpenBao Secrets Management
+# ======================
+OPENBAO_ADDR=http://openbao:8200
+OPENBAO_PORT=8200
+# For development only - remove in production
+OPENBAO_DEV_ROOT_TOKEN_ID=root
+
+# ======================
+# Ollama (Optional AI Service)
+# ======================
+OLLAMA_ENDPOINT=http://ollama:11434
+OLLAMA_PORT=11434
+OLLAMA_EMBEDDING_MODEL=mxbai-embed-large
+
+# Semantic Search Configuration
+SEMANTIC_SEARCH_SIMILARITY_THRESHOLD=0.5
+
+# ======================
+# OpenAI API (Optional)
+# ======================
+# OPENAI_API_KEY=sk-...
+
+# ======================
+# Application Environment
+# ======================
+NODE_ENV=production
+
+# ======================
+# Gitea Integration (Coordinator)
+# ======================
+GITEA_URL=https://git.mosaicstack.dev
+GITEA_BOT_USERNAME=mosaic
+GITEA_BOT_TOKEN=REPLACE_WITH_COORDINATOR_BOT_API_TOKEN
+GITEA_BOT_PASSWORD=REPLACE_WITH_COORDINATOR_BOT_PASSWORD
+GITEA_REPO_OWNER=mosaic
+GITEA_REPO_NAME=stack
+GITEA_WEBHOOK_SECRET=REPLACE_WITH_RANDOM_WEBHOOK_SECRET
+COORDINATOR_API_KEY=REPLACE_WITH_RANDOM_API_KEY_MINIMUM_32_CHARS
+
+# ======================
+# Rate Limiting
+# ======================
+RATE_LIMIT_TTL=60
+RATE_LIMIT_GLOBAL_LIMIT=100
+RATE_LIMIT_WEBHOOK_LIMIT=60
+RATE_LIMIT_COORDINATOR_LIMIT=100
+RATE_LIMIT_HEALTH_LIMIT=300
+RATE_LIMIT_STORAGE=redis
+
+# ======================
+# Orchestrator Configuration
+# ======================
+ORCHESTRATOR_API_KEY=REPLACE_WITH_RANDOM_API_KEY_MINIMUM_32_CHARS
+CLAUDE_API_KEY=REPLACE_WITH_CLAUDE_API_KEY
+
+# ======================
+# Logging & Debugging
+# ======================
+LOG_LEVEL=info
+DEBUG=false