* fix(api): add tiered rate limiting to prevent polling lockouts
Replace the single global rate limiter (100 req/min/IP) with a tiered
system that separates high-frequency polling endpoints from standard
API traffic:
- Polling tier (300/min): /stats, /system/stats, /stacks/statuses,
/metrics/historical, /health, /meta, /auth/status, /auth/sso/providers,
/license. Exempt from the global limiter but governed by their own
safety net to prevent resource exhaustion.
- Standard tier (200/min): All other endpoints, raised from 100.
- Webhook tier (500/min): POST /webhooks/:id/trigger, dedicated limiter
for CI/CD platforms sharing datacenter IPs.
- Auth tier: Unchanged (5-10 attempts / 15 min).
Enterprise adaptations:
- Authenticated requests keyed by user session (JWT sub/username) instead
of IP, preventing shared NAT/VPN environments from pooling budgets.
- Internal node-to-node traffic (node_proxy tokens) bypasses all rate
limiters entirely.
Includes comprehensive stress tests (21 cases) validating tier
separation, node proxy bypass, and per-user keying.
* chore(deps): bump axios to 1.15.0 to fix SSRF vulnerability
Addresses GHSA-3p68-rc4w-qgx5 (NO_PROXY hostname normalization bypass).
Apply a global rate limit of 100 requests/min per IP to all /api/ routes
in production, configurable via API_RATE_LIMIT env var. Auth endpoints
retain their existing stricter limits which stack independently.
Returns 429 Too Many Requests when exceeded.
* feat: SSO & LDAP authentication for Team Pro
Add SSO integration allowing Team Pro users to authenticate via LDAP/Active Directory, Google, GitHub, and Okta identity providers. SSO works alongside password authentication with auto-provisioning and role mapping.
- LDAP bind+search authentication with group-based role mapping
- OIDC/OAuth2 flows with PKCE and CSRF protection for Google, GitHub, Okta
- Auto-provisioning: first SSO login creates a Sencho account automatically
- Role mapping via LDAP group membership or OIDC JWT claims
- SSO settings UI in Settings → SSO with per-provider config and test connection
- SSO login buttons on login page with LDAP toggle
- Environment variable seeding for infrastructure-as-code workflows
- Secrets encrypted at rest via CryptoService (AES-256-GCM)
- Seat limit enforcement during auto-provisioning
- Full documentation: feature docs, quickstart guides, env var reference
* fix: resolve ESLint errors in SSO feature
- Remove unnecessary escape characters in regex character classes
- Remove unused `issuer` variable from OIDC callback handler
- Fix setState-in-effect lint error in Login.tsx by using useState initializer
- Suppress set-state-in-effect for SSOSection fetch pattern (matches existing codebase convention)
Anso