v0.3.1

Added

• GET /keys, DELETE /keys/{key_id} — API key management endpoints
• POST /ws/token — WebSocket authentication token minting
• Per-IP WebSocket connection limit (max 5 simultaneous connections)
• GET /markets/{id}/funding-samples — dense intra-hour funding rate samples for chart rendering
• Early-access gate: wallets not in the allowlist receive 403 early_access_required on write endpoints

Fixed

• x-ratelimit-limit header now correctly reports the IP rate for gateway-key (Unlimited tier) requests
• Deposit route corrected to POST /deposits (was incorrectly documented as POST /account/deposit)
• All error responses standardised to {"code": "...", "message": "..."}