chore: remove unnecessary design document

REGISTRATION_TOKEN_DESIGN.md

@@ -1,119 +0,0 @@
-# Registration Token Design for Secure Auto-Registration
-
-## Current Security Issues
-- Auto-registration endpoint is open by default
-- Tokens sent in plaintext over HTTP
-- No way to limit who can register nodes
-
-## Proposed Solution: Registration Tokens
-
-### How it works:
-
-1. **User generates registration token in UI**:
-   - Click "Generate Registration Token" in Settings → Nodes
-   - Options:
-     - Validity: 15 min, 1 hour, 24 hours
-     - Max uses: 1, 5, unlimited
-     - Allowed node types: PVE, PBS, or both
-   
-2. **Token structure**:
-   ```
-   PULSE-REG-[random]-[checksum]
-   Example: PULSE-REG-x7k9m2p4-a3
-   ```
-
-3. **Backend stores**:
-   ```json
-   {
-     "token": "PULSE-REG-x7k9m2p4-a3",
-     "created": "2025-01-09T10:00:00Z",
-     "expires": "2025-01-09T10:15:00Z",
-     "maxUses": 1,
-     "usedCount": 0,
-     "allowedTypes": ["pve", "pbs"],
-     "createdBy": "admin-ip-address"
-   }
-   ```
-
-4. **Setup script changes**:
-   ```bash
-   # User provides registration token
-   read -p "Enter Pulse registration token: " REG_TOKEN
-   
-   # Send with registration
-   curl -X POST "$PULSE_URL/api/auto-register" \
-     -H "X-Registration-Token: $REG_TOKEN" \
-     -H "Content-Type: application/json" \
-     -d "$REGISTER_JSON"
-   ```
-
-5. **Security benefits**:
-   - Time-limited access
-   - Usage limits
-   - Revocable
-   - Audit trail
-   - No permanent credentials needed
-   - Can work alongside API tokens for extra security
-
-## Migration Path
-
-### Phase 1: Optional (current + tokens)
-- Keep current open endpoint
-- Add registration token as optional security
-- Environment variable to require tokens
-
-### Phase 2: Default secure (tokens required)
-- Require registration tokens by default
-- Add bypass flag for homelab users
-- Clear migration documentation
-
-### Phase 3: Enhanced security
-- Token encryption
-- Token signing with HMAC
-- Token delegation (tokens that can create tokens)
-
-## Comparison with Existing Models
-
-### Kubernetes Join Tokens
-- Similar time-limited approach
-- We simplify by not requiring CA certs
-
-### GitHub Personal Access Tokens
-- Similar UI for generation
-- We add usage limits
-
-### Export/Import Model
-- Uses API token + passphrase
-- Registration tokens are simpler (single token)
-- Both can coexist
-
-## Implementation Priority
-1. Basic token generation and validation
-2. UI for token management
-3. Audit logging
-4. Token encryption (optional)
-
-## Configuration Examples
-
-### High Security Environment
-```bash
-# Require both API token AND registration token
-API_TOKEN=secret-api-token
-REQUIRE_REGISTRATION_TOKEN=true
-REGISTRATION_TOKEN_DEFAULT_VALIDITY=900  # 15 minutes
-REGISTRATION_TOKEN_DEFAULT_MAX_USES=1
-```
-
-### Homelab Environment
-```bash
-# Optional tokens, longer validity
-REQUIRE_REGISTRATION_TOKEN=false
-REGISTRATION_TOKEN_DEFAULT_VALIDITY=86400  # 24 hours
-REGISTRATION_TOKEN_DEFAULT_MAX_USES=10
-```
-
-### Development Environment
-```bash
-# Bypass all security
-ALLOW_UNPROTECTED_AUTO_REGISTER=true
-```